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【兰州大学网院】-分析化学课程作业第一套
试卷总分:100 得分:100
第1题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>电子能级间隔越小,跃迁时吸收的光子的</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、能量越大
B、波长越长
C、波数越大
D、频率越高
正确资料:
第2题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>色谱法中,常用的定性参数是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、保留值
B、峰高
C、峰宽
D、分配比
正确资料:
第3题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>沉淀的类型与定向速度有关,与定向速度大小主要相关的因素是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、离子大小
B、沉淀的极性
C、溶液的浓度
D、溶液的相对过饱和度
正确资料:
第4题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>某酸碱指示剂的</span><i style='mso-bidi-font-style:
normal'><span lang=EN-US>K</span></i><sub><span lang=EN-US>HIN</span></sub><span
lang=EN-US>=1×10<sup>-5</sup></span><span style='font-family:宋体;mso-ascii-font-family:
'Times New Roman';mso-hansi-font-family:'Times New Roman''>,其理论变色范围</span><span
lang=EN-US>pH(<span style='mso-spacerun:yes'> </span>)</span></p>
A、4~5
B、5~6
C、4~6
D、5~7
正确资料:
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在其他实验条件不变的情况下,若柱长增加一倍,则理论塔板数</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>。</span><span lang=EN-US>(</span><span style='font-family:
宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:'Times New Roman''>忽略柱外死体积</span><span
lang=EN-US>)</span></p>
A、不变
B、增加1倍
C、增加<sub><img style='vertical-align:text-bottom' src='http://otsstatic.chinaedu.net/ots/lzu/quesimages/430/20150310100522/fxhx/image002.gif'/></sub>倍
D、减小<sub><img style='vertical-align:text-bottom' src='http://otsstatic.chinaedu.net/ots/lzu/quesimages/430/20150310100522/fxhx/image002.gif'/></sub>倍
正确资料:
第6题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>用于鉴别基团存在的峰称为</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、特征峰
B、相关峰
C、基频峰
D、泛频峰
正确资料:
第7题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>用纯水将下列溶液稀释</span><span lang=EN-US>10</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>倍,其中</span><span lang=EN-US>pH</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>变化最小的是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、1.0 mol/L NH<sub>3</sub>.H<sub>2</sub>O溶液
B、1.0 mol/L HAc溶液
C、1.0 mol/L HCl溶液
D、1.0mol/L HAc + 1.0 mol/L NaAc
正确资料:
第8题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>紫外</span><span lang=EN-US>-</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>可见分光光度法的合适检测波长范围是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、400~800 nm
B、200~400 nm
C、200~800 nm
D、10~200 nm
正确资料:
第9题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列四种化合物中,在紫外光区出现</span><span
lang=EN-US>2</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>个吸收带的是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、乙烯
B、1,4-戊二烯
C、1,3-丁二烯
D、丙烯醛
正确资料:
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman';color:black'>有一组分析数据,若判断其中有无需舍弃的数据,可采用的判断方法是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、F检验
B、t检验
C、Q检验或G检验
D、双侧检验
正确资料:
第11题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>选择指示剂时应考虑</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、指示剂相对分子质量的大小
B、指示剂的变色范围
C、指示剂的颜色变化
D、滴定突跃范围
E、指示剂的pK<sub>HIN</sub>
正确资料:、C、D、E
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列叙述错误的是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、偶然误差影响分析结果的准确度
B、偶然误差的数据大小具有单向性
C、偶然误差在分析中是无法避免的
D、绝对值相同的正、负偶然误差出现的概率大体相等
E、偶然误差可以通过增加平行测定加以减免
正确资料:
第13题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>以下标准溶液可以用直接法配制的是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、KMnO<sub>4</sub>
B、NaOH
C、K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>
D、Na<sub>2</sub>C<sub>2</sub>O
E、C<sub>6</sub>H<sub>5</sub>COOH
正确资料:
第14题,
<p class=MsoNormal><span lang=EN-US>VanDeemter</span><span style='font-family:
宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:'Times New Roman''>方程中,影响</span><span
lang=EN-US>A</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>项的因素有</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、载气相对分子质量
B、固定相颗粒大小
C、载气流速
D、填充均匀度
E、柱温
正确资料:
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列情况所引起的误差,不属于系统误差的是</span></p>
A、称量所用的砝码生锈
B、移液管转移溶液之后残留量稍有不同
C、滴定管刻度未经校正
D、读取滴定管读数时,最后一位数字估计不准
E、在沉淀重量分析中,样品的非被测组分被共沉淀
正确资料:
第16题,
<p class=MsoNormal><span lang=EN-US>EDTA</span><span style='font-family:宋体;
mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:'Times New Roman''>配合物的稳定性与其酸度有关,酸度越大,配合物越稳定。</span></p>
√、对
×、错
正确资料:×
第17题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>比移植</span><i style='mso-bidi-font-style:
normal'><span lang=EN-US>R</span></i><sub><span lang=EN-US>f</span></sub><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>与相对比移植</span><i style='mso-bidi-font-style:normal'><span
lang=EN-US>R</span></i><sub><span lang=EN-US>r</span></sub><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>均为定性参数,但相对比移植能消除系统误差,定性更准确。</span></p>
√、对
×、错
正确资料:
第18题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>电位滴定法分析结果的相对误差与被测离子浓度无关。</span></p>
√、对
×、错
正确资料:
第19题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>指示剂的变色范围越宽滴定误差越小</span></p>
√、对
×、错
正确资料:
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>塔板高度越小,色谱柱的分离效能一定越高。</span></p>
√、对
×、错
正确资料:
第21题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>系统误差的大小、正负是可以被检测出来的,因而是可以校正的。</span></p>
√、对
×、错
正确资料:
第22题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在晶型沉淀的沉淀过程中,若加入沉淀剂过快,除了造成沉淀剂局部过浓影响晶型外,还会发生吸留现象,使分析结果偏高。</span></p>
√、对
×、错
正确资料:√
第23题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>参考水准通常不出现在质子条件式中</span></p>
√、对
×、错
正确资料:
第24题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>一般而言,分子的共轭越多,刚性平面越好,荧光效率越高。</span></p>
√、对
×、错
正确资料:
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>配位滴定的终点误差与</span><span lang=EN-US>ΔpM'</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>有关,而与金属离子的浓度无关。</span></p>
√、对
×、错
正确资料:×
第26题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>助色团对谱带的影响是使谱带</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、波长变长
B、波长变短
C、波长不变
D、谱带蓝移
正确资料:
第27题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>当分子中含有</span><span lang=EN-US>1</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>个溴原子时,由同位素提供的</span><span lang=EN-US>M</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>和</span><span lang=EN-US>M+2</span><span style='font-family:
宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:'Times New Roman''>峰强度比</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、4:1
B、2:1
C、1:1
D、3:1
正确资料:
第28题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>当</span><span lang=EN-US>HCl</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>溶于液氨时,溶液中的最强酸是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、H<sub>3</sub>O<sup>+</sup>
B、NH<sub>3</sub>
C、NH<sub>4</sub><sup>+</sup>
D、NH<sup>2-</sup>
正确资料:
第29题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>按物质与辐射能的转换方向,下列哪种方法不同于其他方法</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、荧光光谱法
B、紫外分光光度法
C、红外光谱法
D、核磁共振波谱法
正确资料:
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>质谱仪的两个核心部件是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、真空系统和样品导入系统
B、离子源和质量分析器
C、真空系统和离子源
D、离子检测系统和样品导入系统
正确资料:
第31题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>用</span><span lang=EN-US>Ce(SO<sub>4</sub>)<sub>2</sub></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>滴定</span><span lang=EN-US>Fe<sup>2+</sup></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>时,两个电对的电极电位相等的情况是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、仅在化学计量点时
B、在滴定剂加入50%时
C、在每加一滴滴定剂平衡后
D、仅在指示剂变色时
正确资料:
第32题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>符合比尔定律的有色溶液稀释时,其最大吸收峰的波长位置将</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、向长波方向移动
B、不移动,但峰高值降低
C、向短波方向移动
D、不移动,但峰高值升高
正确资料:
第33题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在色谱过程中,组分在固定相中停留的时间为</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、t<sub>0</sub>
B、t<sub>R</sub>
C、t<sub>R</sub>´
D、k
正确资料:
第34题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>进行纸色谱时,滤纸的作用是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、固定相
B、展开剂
C、吸附剂
D、惰性载体
正确资料:
第35题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>目前质谱仪中,有多种电离源可供选择,包括</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、电子轰击源
B、大气压化学电离源
C、电喷雾电离源
D、基体辅助激光解吸电离源
E、快电子轰击源
正确资料:、B、C、D、E
第36题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>一般情况下,下列哪种措施可提高反应速度</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、降低温度
B、降低反应物浓度
C、升高温度
D、增加反应物浓度
E、加入正催化剂
正确资料:、D、E
第37题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列关于沉淀溶解度叙述正确的是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、一般来讲,物质的溶解度随温度升高而增加
B、同一沉淀物,其小颗粒的溶解度小于大颗粒的溶解度
C、同一沉淀物,其表面积愈大则溶解度愈大
D、沉淀反应中的陈化作用,对一样大小的沉淀颗粒不起作用
正确资料:、C、D
第38题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>某弱酸的</span><span lang=EN-US>H<sub>2</sub>A</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>的分布系数与</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span><span style='font-family:
宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:'Times New Roman''>有关</span></p>
A、Ka<sub>1</sub>
B、Ka<sub>2</sub>
C、溶液的pH值
D、酸总浓度c
E、溶液的活度系数γ
正确资料:、B、C
第39题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在消除随机误差后,总体平均值就是真值。</span></p>
√、对
×、错
正确资料:√
第40题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>条件电极电位是考虑溶液中存在副反应及离子强度影响之后的电对电极电位。</span></p>
√、对
×、错
正确资料:√
第41题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在沉淀反应中,同一种沉淀颗粒愈大,沉淀吸附杂质量愈多。</span></p>
√、对
×、错
正确资料:×
第42题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在相同的置信水平下,适当增加测定次数</span><span
lang=EN-US>n</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>,可使置信区间显著增大,从而提高分析测定的准确度。</span></p>
√、对
×、错
正确资料:×
第43题,
<p class=MsoNormal><span lang=EN-US>HCl</span><span style='font-family:宋体;
mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:'Times New Roman''>可以滴定硼砂而不能直接滴定</span><span
lang=EN-US>NaAc</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>。</span></p>
√、对
×、错
正确资料:√
第44题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在</span><span lang=EN-US>Volhard</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>法中,提高</span><span lang=EN-US>Fe<sup>3+</sup></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>的浓度,可减小终点时</span><span lang=EN-US>SCN<sup>-</sup></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>的浓度,从而减小滴定误差。</span></p>
√、对
×、错
正确资料:√
第45题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>佛尔哈德法测</span><span lang=EN-US>Cl<sup>-</sup></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>未加硝基苯,测定结果将会偏低。</span></p>
√、对
×、错
正确资料:√
第46题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>当溶剂的自递常数</span><i style='mso-bidi-font-style:
normal'><span lang=EN-US>pK</span></i><sub><span lang=EN-US>S</span></sub><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>值越大,滴定突跃范围越小,滴定终点越不敏锐。</span></p>
√、对
×、错
正确资料:×
第47题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>某二元酸</span><span lang=EN-US>H<sub>2</sub>A</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>的</span><i style='mso-bidi-font-style:normal'><span
lang=EN-US>pK</span></i><sub><span lang=EN-US>a1</span></sub><span
lang=EN-US>=1.2</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>,</span><i style='mso-bidi-font-style:
normal'><span lang=EN-US>pK</span></i><sub><span lang=EN-US>a2</span></sub><span
lang=EN-US>=4.2</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>。欲使</span><span lang=EN-US>HA-</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>为主要存在形式,则需要将溶液</span><span lang=EN-US>pH</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>控制在</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、小于1.2
B、1.2~4.2
C、大于1.2
D、大于5.2
正确资料:
第48题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列对荧光产生的叙述正确的是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、从第一电子激发态的不同能阶发出光量子回到基态
B、从激发三线态的不同能阶发出光量子回到基态
C、从第一电子激发态的最低振动能阶发出光量子回到基态
D、从激发三线态的最低振动能阶发出光量子回到基态
正确资料:
第49题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列违反无定形沉淀的生成条件的是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、沉淀作用宜在较浓的溶液中进行
B、沉淀作用宜在热溶液中进行
C、在不断搅拌下,迅速加入沉淀剂
D、沉淀宜放置过液,使沉淀陈化
正确资料:
资料来源:谋学网(www.mouxue.com),
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在</span><span lang=EN-US>pH=0.5</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>时,银量法测定</span><span lang=EN-US>CaCl<sub>2</sub></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>中的</span><span lang=EN-US>Cl<sup>−</sup></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>合适的指示剂是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、K<sub>2</sub>CrO<sub>4</sub>
B、铁铵矾
C、荧光黄
D、溴甲酚绿
正确资料:
第51题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列关于玻璃电极叙述不正确的是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、玻璃电极属于离子选择性电极
B、玻璃电极可以测定任意溶液的PH值
C、玻璃电极可用作指示电极
D、玻璃电极可用于测定浑浊溶液的PH值
正确资料:
第52题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>影响条件电位的因素有</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、电对的性质
B、氧化还原半反应中得失电子数
C、催化剂
D、温度
E、电对氧化态或还原态发生沉淀、配位等副反应
正确资料:
第53题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>偏离</span><span lang=EN-US>Lambert-Beer</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>定律的光学因素是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、杂散光
B、散射光
C、非平行光
D、荧光
E、反射光
正确资料:
第54题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>强酸强碱滴定突跃的大小与酸碱溶液的浓度有关。</span></p>
√、对
×、错
正确资料:√
第55题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在有共存离子时,可通过调节酸度或采用掩蔽法实现选择性滴定。</span></p>
√、对
×、错
正确资料:
第56题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>碘量法的测定对象既可以为还原剂,又可为氧化剂。</span></p>
√、对
×、错
正确资料:
第57题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>分子非红外活性振动是由于分子振动时</span><span
lang=EN-US>Δµ=0</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>。</span></p>
√、对
×、错
正确资料:
第58题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>参比电极必须具备的条件是只对特定离子有</span><span
lang=EN-US>Nernst</span><span style='font-family:宋体;mso-ascii-font-family:
'Times New Roman';mso-hansi-font-family:'Times New Roman''>响应。</span></p>
√、对
×、错
正确资料:
第59题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>凭借质谱信息便可确定有机化合物的结构。</span></p>
√、对
×、错
正确资料:
第60题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>重量分析法要求称量形式必须与沉淀形式相同。</span></p>
√、对
×、错
正确资料:
第61题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>滴定分析要求反应物的摩尔质量较大</span></p>
√、对
×、错
正确资料:
第62题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>离子选择电极的电位与被测离子活度呈线性关系。</span></p>
√、对
×、错
正确资料:
第63题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>极性弱的溶剂,其介电常数大,溶质在这种溶剂中容易离解,表观酸碱性越强</span></p>
√、对
×、错
正确资料:
第64题,
<p class=MsoNormal><span lang=EN-US>α<sub>M</sub></span><sub><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>(</span><span lang=EN-US>L)</span></sub><span lang=EN-US>=1</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>表示</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、M与L没有副反应
B、M与L的副反应相当严重。
C、M的副反应较小
D、[M]=[L]
正确资料:
第65题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在定量分析中,精密度与准确度之间的关系是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、精密度高,准确度必然高
B、准确度高,精密度必然高
C、精密度是保证准确度的前提
D、准确度是保证精密度的前提
正确资料:
第66题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在重量分析中,洗涤无定形沉淀的洗涤液应是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、冷水
B、含沉淀剂的稀溶液
C、热的电解质溶液
D、热水
正确资料:
第67题,
<p class=MsoNormal><span lang=EN-US>EDTA</span><span style='font-family:宋体;
mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:'Times New Roman''>滴定金属离子</span><span
lang=EN-US>,</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>准确滴定(</span><span lang=EN-US>TE<0.1</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>%)的条件是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、lgK<sub>MY</sub>≥6
B、lgK'<sub>MY</sub>≥6
C、lg(cK<sub>MY</sub>)≥6
D、lg(cK'<sub>MY</sub>)≥6
正确资料:
第68题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:Calibri'>可用下列何种方法减免分析测试中的系统误差</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、进行仪器校正
B、增加测定次数
C、更换操作人员
D、测定时保证环境的湿度一致
正确资料:
第69题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>某碱液</span><span lang=EN-US>25.00ml</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>,用</span><span lang=EN-US>0.1000mol/LHCl</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>滴定至酚酞变色,消耗</span><span lang=EN-US>20.00ml</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>,再加入甲基橙指示剂后继续滴定至变色,又消耗了</span><span lang=EN-US>6.50ml</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>,此碱的组成是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、NaOH
B、NaOH+Na<sub>2</sub>CO<sub>3</sub>
C、NaHCO<sub>3</sub>+Na<sub>2</sub>CO<sub>3</sub>
D、Na<sub>2</sub>CO<sub>3</sub>
正确资料:
第70题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在色谱流出曲线上,相邻两峰间距离取决于</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、两组分分配系数
B、扩散速度
C、理论板数
D、塔板高度
正确资料:
第71题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>选择指示剂时因考虑的因素有</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、指示剂相对分子量的大小<sub></sub>
B、指示剂的变色范围
C、指示剂的颜色变化
D、滴定突越范围
E、指示剂的pK<sub>HIn</sub>
正确资料:、C、D、E
第72题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>用下列那几个参数可以确定分子中基团的连接关系</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、化学位移
B、偶合常数
C、峰裂分数
D、弛豫历程
E、屏蔽常数
正确资料:、B、C
第73题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>有关金属指示剂的叙述,正确的是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、指示剂的变色范围与ΔpM'有关
B、某些金属离子的存在对指示剂产生封闭作用。
C、指示剂的变色范围愈大,终点误差愈大
D、指示剂颜色转变指示剂的使用范围
E、与溶液的PH有关 指示剂颜色转变点:pM<sub>t</sub>=lgK<sub>MIn</sub>-lgα<sub>Y(H)</sub>
正确资料:、D、E
第74题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列叙述中正确的是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、系统误差影响分析结果精密度
B、方法误差属于系统误差
C、精密度是保证准确度的前提
D、准确度是保证精密度的前提
E、精密度好,准确度就好
正确资料:、C
第75题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列操作中,能提高分析结果准确度的是</span></p>
A、对称量所用的仪器进行校正
B、容量分析中,滴加标准溶液的体积越少越好
C、增加平行测量的次数
D、进行空白试验,以消除试剂误差
E、进行对照试验,以保证分析方法可靠
正确资料:、C、D、E
第76题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>如果两组分的分配系数(</span><span lang=EN-US>K</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>)或保留因子(</span><span lang=EN-US>k</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>)不相等,这两个组分一定能在色谱柱中分离。</span></p>
√、对
×、错
正确资料:×
第77题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在凝胶色谱柱中,相对分子质量大的组分先出柱。</span></p>
√、对
×、错
正确资料:√
第78题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>只有塔板高度相同的色谱柱其柱效才能相同。</span></p>
√、对
×、错
正确资料:×
第79题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>玻璃电极膜电位产生的机理是离子交换和扩散。</span></p>
√、对
×、错
正确资料:√
第80题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>沉淀的溶解度越大,沉淀滴定曲线的突跃范围就越大。</span></p>
√、对
×、错
正确资料:×
第81题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在重量分析中,欲获得晶型沉淀,常在稀、热溶液中进行沉淀并进行陈化。</span></p>
√、对
×、错
正确资料:√
第82题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>沉淀洗涤的目的是洗去由于吸留或混晶影响沉淀纯净的杂质。</span></p>
√、对
×、错
正确资料:×
第83题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>副反应的存在影响</span><span lang=EN-US>EDTA</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>与金属离子配位的主反应,无论是反应物还是产物发生副反应,都是不利于主反应的。</span></p>
√、对
×、错
正确资料:×
第84题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>玻璃电极在使用前需要在蒸馏水中浸泡</span><span
lang=EN-US>24</span><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>小时,目的是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、消除液接电位
B、消除不对称电位
C、彻底清除电极表面的杂质离子
D、形成水化层,使不对成电位稳定
正确资料:
第85题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>用</span><span lang=EN-US>KMnO<sub>4</sub></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>标准溶液滴定</span><span lang=EN-US>Na<sub>2</sub>C<sub>2</sub>O<sub>4</sub></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>时,反应速度由慢到快的原因是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、歧化反应
B、诱导反应
C、催化反应
D、自身催化反应
正确资料:
第86题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>配制</span><span lang=EN-US>Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>时,加入少量</span><span lang=EN-US>Na<sub>2</sub>CO<sub>3</sub></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>的目的是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、作抗氧剂
B、增强Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>的还原性
C、中和Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>溶液的酸性
D、防止嗜硫细菌生长和Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>分解
正确资料:
第87题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>下列哪种方法不属于光学分析法</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、质谱法
B、紫外分光光度法
C、X射线衍射法
D、发射光普法
正确资料:
第88题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>产生核磁共振吸收的条件是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、ν<sub>0</sub>=ν
B、Δm=±1
C、ν<sub>l</sub>=Δ
D、ν
E、ΔV=±1
F、ν=γH<sub>0</sub>/2π
正确资料:、B
第89题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>关于滴定突跃范围下列正确的说法是(</span> <span
style='mso-spacerun:yes'> </span><span style='font-family:宋体;mso-ascii-font-family:
'Times New Roman';mso-hansi-font-family:'Times New Roman''>)</span></p>
A、c不变,沉淀的K<sub>sp</sub>越小,沉淀滴定的突跃范围越大
B、c不变,沉淀的K<sub>sp</sub>越小,沉淀滴定的突跃范围越大
C、K<sub>sp</sub>不变,沉淀的c越小,沉淀滴定的突跃范围越小
D、K<sub>sp</sub>不变,沉淀的c越小,沉淀滴定的突跃范围越大
正确资料:、C
第90题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>有</span><span lang=EN-US>1</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>组分析数据,如判断其中有无需舍弃的数据,可采用</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、F检验
B、t检验
C、Q检验
D、G检验
E、相关分析
正确资料:、C、D
第91题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>碘量法测定</span><span lang=EN-US>Cu<sup>2+</sup></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>时,需加入过量的</span><span lang=EN-US>KI</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>与铜试液反应,其作用是</span><span lang=EN-US>(<span
style='mso-spacerun:yes'> </span>)</span></p>
A、提高反应速度
B、减小CuI沉淀的离解程度
C、提高Cu<sup>2+</sup>/Cu<sup>+</sup>电对电位值
D、降低I<sub>2</sub>的挥发性
E、降低CuI对I<sub>2</sub>的吸附,提高测定准确度
正确资料:、B、C、D
第92题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>直接电位法中,加入总离子强度缓冲剂</span><span
lang=EN-US>TISAB</span><span style='font-family:宋体;mso-ascii-font-family:
'Times New Roman';mso-hansi-font-family:'Times New Roman''>的目的是</span><span
lang=EN-US>(<span style='mso-spacerun:yes'> </span>)</span></p>
A、保持电极电位恒定
B、与被测离子形成配位化合物
C、控制溶液酸度
D、固定溶液中离子强度
E、消除共存离子干扰
正确资料:、D、E
第93题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>吸光光度法只能测定有颜色物质的溶液。</span></p>
√、对
×、错
正确资料:×
第94题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>自旋量子数不为零的原子核,产生能级分裂的必要条件是</span><span
lang=EN-US>ν<sub>0</sub>=ν</span><span style='font-family:宋体;mso-ascii-font-family:
'Times New Roman';mso-hansi-font-family:'Times New Roman''>,</span><span
lang=EN-US>Δm=±1</span><span style='font-family:宋体;mso-ascii-font-family:
'Times New Roman';mso-hansi-font-family:'Times New Roman''>。</span></p>
√、对
×、错
正确资料:√
第95题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在氧化还原反应中,改变反应物浓度会影响反应的速度。</span></p>
√、对
×、错
正确资料:√
第96题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>摩尔法测定</span><span lang=EN-US>Cl<sup>-</sup></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>含量时,指示剂</span><span lang=EN-US>K<sub>2</sub>CrO<sub>4</sub></span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>用量越大,终点越易观察,测定结果准确度越高。</span></p>
√、对
×、错
正确资料:×
第97题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>在沉淀滴定中,生成沉淀的溶解度越大,滴定的突跃范围就越大。</span></p>
√、对
×、错
正确资料:×
第98题,
<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:'Times New Roman';
mso-hansi-font-family:'Times New Roman''>法扬斯法中吸附指示剂的</span><span lang=EN-US>Ka</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>愈大,滴定适用的</span><span lang=EN-US>pH</span><span
style='font-family:宋体;mso-ascii-font-family:'Times New Roman';mso-hansi-font-family:
'Times New Roman''>愈低。</span></p>
√、对
×、错
正确资料:√
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