20春学期《分析化学》在线平时作业2

adminhan

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">下列各项定义中不正确的是（）</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><o:p></o:p></span></p><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"></span>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">A</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、</span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">绝对误差是测定值与真值之差</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp; </span><o:p></o:p></font></span></p>
B:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">B</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、</span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">相对误差是绝对误差在真值中所占的百分比</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman"> <o:p></o:p></font></span></p><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"> </span>
C:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">C</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、</span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">偏差是指测定值与平均值之差</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span><o:p></o:p></font></span></p>
D:<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">D</span><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">）、</span><span style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">总体平均值就是真值</span>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在重量分析中，被测组分不能完全沉淀下来，应该进行（）</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><o:p></o:p></span></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">A</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、对照试验</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">&nbsp;<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span></font></span></p>
B:<font size="3"><font face="Times New Roman">B</font><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、空白试验</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span></font></span></font>
C:<font size="3"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;</span>C</font><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、仪器校准</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></font></span></font>
D:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">D</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、方法校正</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></font></span></p>
E:<font size="3"><font face="Times New Roman">E</font><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、增加测定次数</span></font>

<div>在下列各组酸碱组分中，属于共轭酸碱对的是（）</div>
A:<div>HCN-NaCN<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></div>
B:H₃PO₄-Na₂HPO₄
C:⁺NH₃CH₂COOH-NH₂CH₂COO^-&nbsp;<span>&nbsp;&nbsp;</span>
D:&nbsp;H₃O⁺-OH^-

<div>在EDTA配位滴定中，下列有关掩蔽剂的叙述，错误的是（）</div>
A:<div>配位掩蔽剂必须可溶且无色</div>
B:沉淀掩蔽生成的沉淀，其溶解度要很小
C:氧化还原掩蔽剂必须能改变干扰离子的氧化态
D:掩蔽剂的用量愈多愈好

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">按</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">Q</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">检验法（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">n=4</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">Q_0.90=0.76</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">），下列哪组数据中有该舍弃的可疑数值（）</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><o:p></o:p></span></p>
A:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">A</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.5050</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.5063</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.5042</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.5067<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span></font></span>
B:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">B</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.1018</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.1024</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.1015</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">0.1040<o:p></o:p></font></span></p>
C:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">C</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">12.85</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">12.82</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">12.79</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">12.54<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></font></span></p>
D:<font size="3"><font face="Times New Roman">&nbsp;D</font><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">35.62</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">35.55</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">35.57</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><font face="Times New Roman">35.36 <o:p></o:p></font></span></font>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">试指出下述说法中哪一种说法是错误的（）。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><o:p></o:p></span></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">氮气是气相色谱中常用的流动相</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-hansi-font-family: 宋体"><o:p></o:p></span></p>
B:<font size="3"><font face="宋体">固定液是气相色谱的固定相<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><o:p></o:p></span></font></font>
C:<font size="3"><font face="宋体">气相色谱的分离原理是利用不同组分在两相中分配系数不同<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%"><o:p></o:p></span></font></font>
D:<font face="宋体" size="3">气相色谱是一个分离效能高、分析速度快的分析方法</font>

<div>下列说法正确的是（）</div>
A:<div>电对的电位越低，其氧化型的氧化能力越强</div>
B:电对的电位越高，其还原型的还原能力越强
C:一种氧化剂可以氧化电位比它高的还原剂
D:一种还原剂可以还原电位比它低的氧化剂
E:某电对的氧化型可以氧化电位比它低的另一电对的还原型

<div>自动催化反应的特点是反应速度（）</div>
A:<div>慢<span>&nbsp;&nbsp; </span></div>
B:快<span>&nbsp;</span>
C:慢&rarr;快<span>&nbsp;&nbsp;</span>
D:快&rarr;慢
E:快&rarr;慢&rarr;快

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">相同质量的</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Fe³⁺</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">和</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Cd²⁺[<em style="mso-bidi-font-style: normal">A</em>_r(Fe)=55.85</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><font face="Times New Roman"><em style="mso-bidi-font-style: normal"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%">A</span></em>_{<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%">r</span>}<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%">(Cd)=112.4]</span></font><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">各用一种显色剂在同样体积溶液中显色，用分光光度法测定</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">,</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">前者用</span><st1:chmetcnv w:st="on" unitname="cm" sourcevalue="2" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">2cm</font></span></st1:chmetcnv><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">比色皿，后者用</span><st1:chmetcnv w:st="on" unitname="cm" sourcevalue="1" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">1cm</font></span></st1:chmetcnv><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">比色皿，测得的吸光度相同，则两有色络合物的摩尔吸光系数为（）</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><o:p></o:p></span></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">基本相同</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></font></span></p>
B:<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Fe³⁺</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">为</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Cd²⁺</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">的两倍</span>
C:<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Cd²⁺</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">为</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Fe³⁺</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">的两倍</span>
D:<span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Cd²⁺</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">为</span><span lang="EN-US" style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%"><font face="Times New Roman">Fe³⁺</font></span><span style="FONT-SIZE: 12pt; COLOR: black; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'">的四倍</span>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 0pt">下列表述中，最能说明系统误差小的是（）</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt"><o:p></o:p></span></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-layout-grid-align: none" align="left"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt"><font face="Times New Roman">A</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">）、</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 0pt">高精密度</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt"><font face="Times New Roman">&nbsp;<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span></font></span></p>
B:<font size="3"><font face="Times New Roman">B</font><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">）、</span></font><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 0pt">与已知的质量分数的试样多次分析结果的平均值一致</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt"><o:p></o:p></span><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 0pt"></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt"><o:p></o:p></span></p>
C:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt"><font face="Times New Roman">C</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">）、</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 0pt">标准差大</span><font face="Times New Roman"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt"><span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span></font></p>
D:<font size="3"><font face="Times New Roman">D</font><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">）、</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 0pt">仔细校正所用砝码和容量仪器等</span></font>

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">指示电极的标准电极电位是以饱和甘汞参比电极为基准获得的。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">某试样的色谱图上出现三个色谱峰，该试样最多有三个组分。</span>
A:错误
B:正确

<span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">H₃PO₄</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">与</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">PO₄^3-</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">是共轭酸碱对。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">有色溶液的透光率随溶液浓度增大而减小，所以透光率与溶液浓度呈反比例关系。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">某人分析结果的精密度很高，那么其分析结果的准确度一定很高。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">在色谱分析中，理论塔板高度与载气线速</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">&mu;</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">的关系为：随</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">&mu;</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">的增加，理论塔板高度增大。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电对的氧化态生成沉淀时，电对的条件电极电位将减小或降低。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">示差分光光度法适用于低含量组分的分析。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">一元弱酸溶液的氢离子浓度等于酸的浓度。</span>
A:错误
B:正确

<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">参比电极的电极电位不随温度变化是其特征之一。</span>
A:错误
B:正确