用惰性电极电解一定浓度的硫酸铜溶液，通电一段时间后，向所得溶液中加入0.1 mol Cu(OH)2后恰好恢复到电解前的浓度和pH。则电解过程中两极产生气体的总物质的量为
A．0.1 mol
B．0.2 mol
C．0.3 mol
D．0.4 mol
答案：B
题目分析：电解硫酸铜溶液的反应方程式为：2CuSO4+2H2O=2Cu+2H2SO4+O2↑从上述方程式可以看出，因此，电解前后只有铜和氧的改变，电解后加入CuO就可以使溶液恢复原来状态。但本题提示加入Cu(OH)2后溶液恢复原来状态，说明电解过程中不仅硫酸铜被电解，而且有水被电解（因为硫酸铜被电解完全）。0.1molCu（OH）2可以可以看作是0.1mol的CuO和0.1mol H2O，因此电解过程中有0.1mol的硫酸铜和0.1mol的水被电解。所以两极分别产生0.1molH2和0.1molO2，因此答案为D。
点评：本题如果从加入Cu(OH)2的量来判断产生的氢气和氧气的量更简单。
阅读短文并回答问题，将答案写到答题卡相应的位置上（请注意问题后的词数要求）。 You can't avoid a conflict at work. If you can avoid a conflict, it means you will win what you want regardless of what the other person wants. Since the potential issue has not been removed, it will simply reappear later. Here are the necessary steps to effectively get rid of conflicts at work. ★ Realize that some conflicts are unavoidable at work. On numerous occasions, conflict and disagreement are likely to happen. But when a conflict happens it's not the end of the world. On the contrary, it can be the beginning of an interesting learning process. Conflicts mean that people care enough to disagree strongly. The trick is not to allow the conflict to go on forever. ★ Handle conflicts sooner rather than later. Solve a conflict when it starts, as it only gets worse with time going by. Conflicts at work arise not from something that was said, but from something that wasn't said! Everyone's waiting for the other to admit he's wrong and gets more unpleasant after the conflict has lasted a while. It's essential to interrupt the "waiting game" before it gets to that point. ★ Ask nicely. If somebody has done something that made you angry, or if you don't understand their viewpoint or actions, simply asking nicely about it can make a world of difference. Never assume that people do what they do to annoy or hurt you. Sometimes there's a good reason why that person does what he or she does, and a potential conflict disappear right there. Do remember to make an inquiry, not an accusation of any sort. ★ Appreciate. Praise the other part in the conflict. Tell them why it's worth it to you to solve the conflict. This can be difficult as few people find it easy to praise and appreciate a person they disagree strongly with, but it's a great way to move forward.
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