[求助]有机
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">、请解释为什么顺</span><span lang="EN-US"><font face="Times New Roman">-</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">丁烯二酸的</span><span lang="EN-US"><font face="Times New Roman">pka1(1.83)</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">较反</span><span lang="EN-US"><font face="Times New Roman">-</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">丁烯二酸的</span><span lang="EN-US"><font face="Times New Roman">pka1</font></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"><font face="Times New Roman">2.03</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）小？而顺</span><span lang="EN-US"><font face="Times New Roman">-</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">丁烯二酸的</span><span lang="EN-US"><font face="Times New Roman">pka2</font></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"><font face="Times New Roman">6.0</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）较反</span><span lang="EN-US"><font face="Times New Roman">-</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">丁烯二酸的</span><span lang="EN-US"><font face="Times New Roman">pka2</font></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"><font face="Times New Roman">4.44</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）大？</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">、进行有机合成时，常使某反应物过量，请问选择那种反应物过量应符合哪些条件？</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">3、有一有机溶液经气相色谱分析知其中个物质的沸点大致为80°C(溶剂)，120°C（产物），200°C（原料），300—320°C（产物）。要分析产物的结构就需要分离出各产物，请设计分离提纯方法。 <p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 12pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto;"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体;">4、一般情况下，有机合成反应生成目标产物的同时，大多数都会生成一定量的副产物，因此分离，纯化和坚定化合物的结构是有机制备中化学中必须面对的任务。请回答（1），一个有机合成反应完成后，怎样得到纯的，单一组分的目的产物。（2），怎样鉴定一个有机化合物的纯度和结构，请结合要使用的分析仪器的功能和方法进行简要说明。<p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><p><font face="Times New Roman"> </font></p></span></p>
