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    <title>张老师 - 答疑</title>
    <link>https://www.cshxw.com/forum-40-1.html</link>
    <description>Latest 20 threads of 答疑</description>
    <copyright>Copyright(C) 张老师</copyright>
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      <title>张老师</title>
      <link>https://www.cshxw.com/</link>
    </image>
    <item>
      <title>问题：苏州收集二氧化碳可以用排水法</title>
      <link>https://www.cshxw.com/thread-947-1-1.html</link>
      <description><![CDATA[因为二氧化碳在水中的逸出速率大于溶解速率]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Thu, 18 Dec 2025 02:57:48 +0000</pubDate>
    </item>
    <item>
      <title>问题：根据电极电势分析反应是否发生</title>
      <link>https://www.cshxw.com/thread-945-1-1.html</link>
      <description><![CDATA[比如过氧化氢能氧化Ce3+

过氧化氢/水  电对电极电势+1.77V，比Ce4+/Ce3+  1.61   的要大，故是过氧化氢氧化三价铈离子

其他氧化剂要不毒性强，要不引入新杂质]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Wed, 10 Dec 2025 01:44:41 +0000</pubDate>
    </item>
    <item>
      <title>问题：喷泉实验，先挤压胶头再打开止水夹</title>
      <link>https://www.cshxw.com/thread-944-1-1.html</link>
      <description><![CDATA[先挤压，内外产生气压差]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Wed, 10 Dec 2025 00:42:23 +0000</pubDate>
    </item>
    <item>
      <title>验证质量守恒定律时，玻璃管上方气球的作用</title>
      <link>https://www.cshxw.com/thread-940-1-1.html</link>
      <description><![CDATA[气球的作用主要是缓冲，防止因气压过大使橡皮塞冲出]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Wed, 19 Nov 2025 06:29:18 +0000</pubDate>
    </item>
    <item>
      <title>问题：什么是比表面积</title>
      <link>https://www.cshxw.com/thread-937-1-1.html</link>
      <description><![CDATA[答：多孔固体物质单位质量所具有的表面积，比表面积越大，吸附能力越强]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 13 Oct 2025 06:44:45 +0000</pubDate>
    </item>
    <item>
      <title>问题：如何理解萃取</title>
      <link>https://www.cshxw.com/thread-936-1-1.html</link>
      <description><![CDATA[]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Wed, 24 Sep 2025 11:42:06 +0000</pubDate>
    </item>
    <item>
      <title>温度对pH的影响</title>
      <link>https://www.cshxw.com/thread-929-1-1.html</link>
      <description><![CDATA[若溶液为强酸pH不变，若溶液为其他pH一般变小]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Sun, 10 Aug 2025 12:04:59 +0000</pubDate>
    </item>
    <item>
      <title>氯气的化学性质</title>
      <link>https://www.cshxw.com/thread-920-1-1.html</link>
      <description><![CDATA[与钠反应
剧烈燃烧，黄色火焰，产生白烟

与铁反应

剧烈燃烧，产生棕褐色的烟

与铜反应

剧烈燃烧，产生棕黄色的烟

与氢气反应

安静燃烧，火焰苍白色，瓶口有白雾

与水反应

与氢氧化钠、氢氧化钙反应

 ...]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 07 Jul 2025 01:51:56 +0000</pubDate>
    </item>
    <item>
      <title>萃取满足条件</title>
      <link>https://www.cshxw.com/thread-919-1-1.html</link>
      <description><![CDATA[①溶质在两种溶剂种溶解度相差很大

②两种溶剂互不相溶

③互不反应]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 07 Jul 2025 01:49:28 +0000</pubDate>
    </item>
    <item>
      <title>问题：烯烃的化学性质</title>
      <link>https://www.cshxw.com/thread-918-1-1.html</link>
      <description><![CDATA[加成反应

                        烯                   炔                        苯

H2                    √                    √                        √

HX                   √                     √                        ×

H2O               ...]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 07 Jul 2025 00:38:37 +0000</pubDate>
    </item>
    <item>
      <title>醇的化学性质</title>
      <link>https://www.cshxw.com/thread-917-1-1.html</link>
      <description><![CDATA[]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 07 Jul 2025 00:30:47 +0000</pubDate>
    </item>
    <item>
      <title>卤素原子的引入和转化</title>
      <link>https://www.cshxw.com/thread-916-1-1.html</link>
      <description><![CDATA[]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 07 Jul 2025 00:28:42 +0000</pubDate>
    </item>
    <item>
      <title>保护官能团</title>
      <link>https://www.cshxw.com/thread-915-1-1.html</link>
      <description><![CDATA[]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 07 Jul 2025 00:25:21 +0000</pubDate>
    </item>
    <item>
      <title>问题：杂化轨道重中s轨道成分计算</title>
      <link>https://www.cshxw.com/thread-892-1-1.html</link>
      <description><![CDATA[杂化轨道中s轨道成分越多，元素的电负性越强，连接在该碳原子上的氢原子越容易电离，也就越容易在碱性体系中形成阴离子。
碳原子常见的杂化方式有sp3、sp2、sp。

sp3杂化中s轨道成分占1/4，
sp2杂化中s轨道成分占1/3，
sp杂化中s轨道成分占1/2。


sp杂化分子最容易在 ...]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Fri, 02 May 2025 07:47:16 +0000</pubDate>
    </item>
    <item>
      <title>问题：氯气能把碘氧化为什么呢？</title>
      <link>https://www.cshxw.com/thread-891-1-1.html</link>
      <description><![CDATA[答：碘酸根]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Fri, 02 May 2025 07:38:33 +0000</pubDate>
    </item>
    <item>
      <title>问题：区分极性分子和非极性分子</title>
      <link>https://www.cshxw.com/thread-884-1-1.html</link>
      <description><![CDATA[]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Wed, 16 Apr 2025 13:51:20 +0000</pubDate>
    </item>
    <item>
      <title>问题：将石油裂解产生的气体，通入高锰酸钾溶液</title>
      <link>https://www.cshxw.com/thread-883-1-1.html</link>
      <description><![CDATA[证明裂解气中存在乙烯，错的，只能说明裂解气中有不饱和键，万一是丙烯呢？]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Wed, 16 Apr 2025 00:09:19 +0000</pubDate>
    </item>
    <item>
      <title>问题：如何证明碳酸钠溶液中存在水解平衡</title>
      <link>https://www.cshxw.com/thread-881-1-1.html</link>
      <description><![CDATA[答：向滴有酚酞的碳酸钠溶液中加入少量氯化钡溶液，颜色变浅]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Wed, 16 Apr 2025 00:04:00 +0000</pubDate>
    </item>
    <item>
      <title>问题：结构化学中的lp和bp指的是</title>
      <link>https://www.cshxw.com/thread-879-1-1.html</link>
      <description><![CDATA[lp指的是孤电子对
bp指的是成键电子对]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Mon, 07 Apr 2025 13:26:25 +0000</pubDate>
    </item>
    <item>
      <title>问题：物质的分离和提纯分析</title>
      <link>https://www.cshxw.com/thread-878-1-1.html</link>
      <description><![CDATA[]]></description>
      <category>答疑</category>
      <author>admin</author>
      <pubDate>Sun, 06 Apr 2025 14:02:55 +0000</pubDate>
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