试题与答案

在某次电解水的实验中加入了少量的NaOH溶液,测得分别与电源正、负两极相连的阳、

题型:填空题

题目:

在某次电解水的实验中加入了少量的NaOH溶液,测得分别与电源正、负两极相连的阳、阴两极上产生的气体体积,实验数据如下表所示:

(1)仔细分析以上实验数据,1~6分钟内阴、阳两极生成的气体体积之比大于2︰1,可能的原因是________________________________________。

(2)从第7分钟开始,每分钟内阴、阳两极生成的气体体积之比约为2︰1,可能的原因为______________________________________________。

(3)将质量分数为5%的NaOH溶液100克进行电解,当溶液中NaOH的质量分数变成6%时停止电解,则生成的H2的质量是多少?(写出计算过程)

答案:

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参考答案:【答案】唇舌侧方向摇动,以向唇侧为主;颊舌方向摇动,以向舌侧为主;颊舌向方向摇动,以向舌侧为主;颊腭侧方向摇动,以向颊侧为主

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