1.综合题- (共1题)

(1)若两池中均为CuSO4溶液,反应一段时间后
①有红色物质析出的是甲池中的____________棒,乙池中的____________棒。
②乙池中阳极的电极反应式是________________________。
(2)若两池中均为饱和NaCl溶液
①写出乙池中总反应的离子方程式_____________________________________。
②甲池中碳极上电极反应式是________________________, 乙池碳极上电极反应属于_____________________ (填氧化反应、还原反应)。
③将湿润的淀粉KI试纸放在乙池碳极附近,发现试纸变蓝,待一段时间后又发现蓝色褪去。这是因为过量的Cl2将生成的I2又氧化。若反应的Cl2和I2物质的量之比为
5:1,且生成两种酸,该反应的化学方程式为____________________________ 。
④若乙池转移0.02mole-后停止实验,池中溶液体积是200mL,则溶液混匀后的pH=____________
2.单选题- (共2题)

A.甲、丙中是化学能转变为电能,乙中是电能转变为化学能 |
B.C1、C2分别是阳极、阴极,锌片、铁片上都发生氧化反应 |
C.C1和C3放出的气体相同,铜片和铁片放出的气体也相同 |
D.甲、乙中溶液的pH逐渐升高,丙中溶液的pH逐渐减小 |
A.×100% | B.×100% | C.% | D.% |
3.选择题- (共3题)
It seems that everywhere around the world, people are spending more time at work and less time with their families and friends.People are busier than ever before.
In the past in many countries,the father worked and the mother stayed at home, took care of the children, and did the food shopping,cooking,and cleaning.At present in most of the families,parents need to work on weekends,so they both have to do the shopping,cooking,and cleaning in their free time.Parents don't have much time with their children,however,they often had time in the past.There are also many single parent(单亲的)families.In these families,the single parent has to do everything.
These days,many children come home from school to an empty apartment or house.A lot of children spend many hours each day in front of the television.Even when families are together,it is common for family members to do things by themselves.For example,they watch programs on their own TVs in different rooms,they use the Internet,they talk with friends on the telephone,and they do other things by themselves.
Isn't it strange?Thanks to technology,people are able to communicate so easily with people far away,but sometimes they don't communicate with people in their own homes.
It seems that everywhere around the world, people are spending more time at work and less time with their families and friends.People are busier than ever before.
In the past in many countries,the father worked and the mother stayed at home, took care of the children, and did the food shopping,cooking,and cleaning.At present in most of the families,parents need to work on weekends,so they both have to do the shopping,cooking,and cleaning in their free time.Parents don't have much time with their children,however,they often had time in the past.There are also many single parent(单亲的)families.In these families,the single parent has to do everything.
These days,many children come home from school to an empty apartment or house.A lot of children spend many hours each day in front of the television.Even when families are together,it is common for family members to do things by themselves.For example,they watch programs on their own TVs in different rooms,they use the Internet,they talk with friends on the telephone,and they do other things by themselves.
Isn't it strange?Thanks to technology,people are able to communicate so easily with people far away,but sometimes they don't communicate with people in their own homes.
根据句子中的拼音写词语。
①大火(xī miè){#blank#}1{#/blank#} 后,人们进山寻找,发现介子推和老母亲坐在一棵烧焦了的老柳树下,已经死了。
②我不求报答,但愿主公不要忘记我割肉的痛苦,多想些{#blank#}2{#/blank#} (zhì ɡuó ān bānɡ)的办法,做一位贤明的国君。
③重耳{#blank#}3{#/blank#} (lánɡ tūn hǔ yàn)地吃完了,问:“这是哪儿来的肉?”介子推把真实情况告诉他。
4.填空题- (共1题)
(1)工业上用NaCl制备金属钠的化学方程式是____________________________________
________________________________________________________________________。
(2)实验室用惰性电极电解100 mL 0.1 mol·L-1 NaCl溶液,若阴阳两极均得到112 mL气体(标准状况),则所得溶液的pH为________(忽略反应前后溶液的体积变化)。
(3)电解氯化钠溶液可制备“84消毒液”(主要成分是次氯酸钠),通电时氯气被溶液完全吸收。假设所得的消毒液仅含一种溶质,请写出相应的总化学方程式________________________________________________________________________。
(4)该小组同学认为,如果模拟工业上离子交换膜法制烧碱的方法,可以设想用如图装置电解硫酸钾溶液来制取氢气、氧气、硫酸和氢氧化钾。

①该电解槽的阳极反应式为:_______________________________________________;
通过阴离子交换膜的离子数________(填“大于”、“小于”或“等于”)通过阳离子交换膜的离子数。
②制得的氢氧化钾溶液从出口(填写“A”、“B”、“C”或“D”)________导出。
③请简述通电开始后,阴极附近溶液pH变化的原因:____________________。
④若将制得的氢气、氧气和氢氧化钾溶液组合为氢氧燃烧电池,则电池正极的电极反应式为_______________________________________________________。
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【1】题量占比
综合题:(1道)
单选题:(2道)
选择题:(3道)
填空题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:2
5星难题:0
6星难题:2
7星难题:0
8星难题:0
9星难题:0