1:1  12-21[理·化学]周老师教大家解决陌生的氧化还原方程式
推荐理由：碰到陌生的氧化还原方程式该如何一步一步分析、解决？周老师将在本道题中告诉你！ 讲解人：http://www.jiandan100.cn/teacher/3cdd11338c32452fb10ffaeed386604a/ ，北京市东城区中学教研室主任，北京市化学特级教师。 题面：CaH2（氢元素呈－1价）常作生氢剂。对于反应CaH2+2H2O=Ca(OH)2+2H2↑，有如下判断： ①H2只是氧化产物； ②H2既是氧化产物，又是还原产物； ③H2O是氧化剂； ④CaH2中含Ca2+ ，它属于盐类； ⑤此反应中的氧化产物与还原产物的分子数之比是1∶1。 上述判断中正确的是（ ） A.①④⑤ B.②③④ C.③④⑤ D.②③⑤ 【答案及详解】
本部分内容设定了隐藏,需要回复后才能看到  跟帖分享你的答案，即可看到正确答案和解析！别忘了回帖后再点进来查看答案哦~掌握方法了吗？自己去练习一道题吧 ------------------------------------------------------------------------------------------------------------------------------------------------------------------ 查看更多本年级每周一题，请点击：http://www.jiandan100.cn/bbs/upload/forumdisplay.php?fid=382& 浏览本期“简单学习电子周报”完整目录：http://www.jiandan100.cn/bbs/upload/viewthread.php?tid=657798 |
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