中考化学必考点：气体实验室制备
<p style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> 今天来说说在中考化学实验题中，充当着<strong>每年必考点的——气体的实验室制备</strong>。</p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> 有关气体制备实验装置的选择，化学方程式的书写，同学们都烂熟于心。然而，<strong>开放性，探究性实验越来越作为考察的热点</strong>。加入气体的净化，混合气体中成分的检验等内容的考核，则增强了题目的灵活性，也提高卷面总体难度，同学们一不小心就容易被这些瓶瓶罐罐所反攻。</p><p style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> 那怎么办？当然要攻略！来一段完整版的气体净化及检验方法。</p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> 1.用于气体的收集</p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> 2.用于气体的干燥、除杂与检验</p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> 3.用于安全瓶 (伸入集气瓶中的导管一样长)左边连接实验发生装置需加热，右边连接气体的排水收集装置或者检验、除杂装置，为了避免实验操作不当而发生倒吸。比如在一氧化碳还原氧化铜加热的发生装置和用于产物二氧化碳检验的澄清石灰水中间增加一个安全瓶，避免发生倒吸。</p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p><p style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> 通过以上这些要点的掌握，希望各位考生在考试中"举瓶而反攻之"。</p><p class="image_con loaded" style="margin: 0px 0px 1em; padding: 0px; color: rgb(0, 0, 0); font-family: -apple-system, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif; font-size: 14px;"> </p>
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