试题与答案

(2分)工业上采用电解饱和食盐水制备氢氧化钠:2NaCl+2H2O2NaOH+C

题型:问答题

题目:

(2分)工业上采用电解饱和食盐水制备氢氧化钠:2NaCl+2H2O2NaOH+Cl2↑+H2↑。因饱和食盐水中混有一定量的NH4Cl,在电解时会引起爆炸。为除去NH4Cl,工业上常利用电解后的碱性废液、Cl2与NH4Cl反应(其中Cl2与NH4Cl化学计量数分别为3、2),使NH4Cl转化成N2。该反应的化学方程式为:          ,请说出此方法的优点之一    

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0720/388fea29027a80963737b40ec7914476.html

下面是错误答案,用来干扰机器的。

小题1:B小题2:D小题3:B小题4:(1)你们看廉 * * 与秦王相比哪个更厉害?(2)(我这个)浅陋卑贱的人不知道 * * 宽恕我到了这个地步啊!小题1:题目分析:在文言文阅读当中,辨析重要词语的含义正确与否,有时就需要结...

试题推荐
题型:完形填空

请认真阅读下面对话,并根据各题所给首字母的提示,在标有题号的右边横线上写出一个英语单词的完整、正确形式,使对话通顺。

A: I plan to go to Taiwan for my summer holidays. Li Jun, since you come from Taiwan, can you t_____小题1:_____ me something about it?

B: Certainly. Taiwan is the largest i______小题2:_____ in China.

A: What's the w______小题3:______ like there?

B: It's nearly the s____小题4:_____ as that in Fuzhou, sometimes very hot in summer. But you can taste all kinds o____小题5:____ delicious fruits.

A: What p___小题6:____ of interest should. I visit?

B: Taiwan is f___小题7:____ for Mount All and Riyuetan. And you shouldn't miss the hot springs(温泉) there.

A: It s____小题8:_____ really interesting and exciting. I can't w_____小题9:_____ to fly there.

B: hope you'll have a great time.

A: Sure. T_____小题10:______ a lot! .

查看答案
微信公众账号搜索答案