【简答题】氯碱工业中电解饱和食盐水的原理示意图如下图所示: (1)溶液A的溶质是 ; (2)电解饱和食盐水的离子方程式是 ; (3)电解时用盐酸控制阳极区溶液的pH在2~3,用化学平衡移动原理解释盐酸的作用 ; (4)电解所用的盐水需精制。去除有影响的Ca 2 + 、Mg 2 + 、NH 4 + 、SO 4 2 - [c(SO 4 2 - >c(Ca 2 + )]。精致流程如下(淡盐水和溶液A来自电解池):...
【简答题】(12分)氯碱工业中电解饱和食盐水的原理示意图如下图所示: (1)溶液A的溶质是 ; (2)电解饱和食盐水的离子方程式是 ; (3)电解时用盐酸控制阳极区溶液的pH在2~3,用化学平衡移动原理解释盐酸的作用 ; (4)电解所用的盐水需精制。去除有影响的Ca 2 + 、Mg 2 + 、NH 4 + 、SO 4 2 - [c(SO 4 2 - )>c(Ca 2 + )]。 精致流程如下(淡盐水和溶液A...
【简答题】Dear Aunty, After years of her crying. I finally gave in and allowed my daughter to have a cat. I now regret my decision. As someone needs to have a clean, tidy house, I no longer feel relaxed in my o...
【简答题】氯碱工业中电解饱和食盐水的原理示意图如右图所示 (1)溶液A的溶质是 ; (2)电解饱和食盐水的离子方程式是 (3)电解时用盐酸控制阳极区溶液的pH在2~3,用化学平衡移动原理解释盐酸的作用 (4)电解所用的盐水需精制。去除有影响的 、 ,NH + 3 , ,[ > ]。 精致流程如下(淡盐水和溶液A来电解池): ①盐泥a除泥沙外,还含有的物质是 。 ②过程Ⅰ中将NH 4 + 转化为N 2 的离子...
【单选题】Which of the following is NOT the disturbing images of Global Warming according to the text?
A.
The Aral Sea is disappearing.
B.
The polar ice cap is thickening.
C.
The ghostly images appear in the sky.
D.
We are silencing the thousands of songs we have never even heard.
【单选题】Which of the following is NOT the disturbing images of Global Warming according to the text?
A.
The Aral Sea is disappearing.
B.
The polar ice cap is thickening.
C.
We are silencing the thousands of songs we have never even heard.
D.
The ghostly images appear in the sky.
【单选题】Which is the following statement is true according to the text?
A.
Burberry is a local English brand and can be seen only in England.
B.
Char usually wear a special kind of uniform. with a plaid cap.
C.
Chars are people of fancy taste.
D.
What the socalled chavs wear now are not real products of Burberry.
【简答题】氯碱工业中电解饱和食盐水的原理示意图如图所示。 ⑴溶液A的溶质是___________。 ⑵电解饱和食盐水的离子方程式是___________。 ⑶电解时用盐酸控制阳极区溶液的pH在2~3。用化学平衡移动原理解释盐酸的作用:___________。 ⑷电解所用的盐水需精制,去除有影响的Ca 2+ 、Mg 2+ 、NH 4 + 、SO 4 2- [c(SO 4 2- )>c(Ca 2+ )]。精制流...
【简答题】(20分)氯碱工业中电解饱和食盐水的原理示意图,如图所示: (1)溶液A的溶质是 ; (2)电解饱和食盐水的离子方程式是 ; (3)电解时用盐酸控制阳极区溶液的pH在2~3,用化学平衡移动原理解释盐酸的作用 ; (4)电解所用的盐水需精制。 去除有影响的Ca 2 + 、Mg 2 + 、N H 4 + 、SO 4 2 - [c(SO 4 2 - )>c(Ca 2 + )]。 精致流程如下(淡盐水和溶...
【判断题】在PowerPoint2010中,幻灯片中不能设置页眉、页脚。