问题 选择题

如图:一种微型纽扣电池,其电极材料分别为Ag2O和Zn,电解质溶液是KOH溶液。负极的反应式:Zn-2e+2OH==ZnO+H2O,该电池总反应式为:Zn+Ag2O==ZnO+2Ag。

根据以上提供的资料,判断下列说法正确的是

A.正极的反应式: Ag2O +2e+H2O=2Ag+2OH

B.放电时负极附近溶液的pH不变

C.放电时每消耗6.5gZn,转移电子0.1mol

D.放电时溶液中阴离子向正极极方向移动,阳离子向负极方向移动

答案

答案:A

电池总反应式为:Zn+Ag2O==ZnO+2Ag

负极的反应式:Zn-2e+2OH==ZnO+H2O

正极的反应式:Ag2O+2e+H2O ==2Ag+2OH

B项:由反应式可知,负极反应消耗OH,故PH减小;

C项:负极式可知,每消耗6.5gZn,转移电子0.2mol

D项:放电时溶液中阴离子向负极方向移动,阳离子向正极方向移动

阅读理解
阅读理解。
                 Films in Grand Movie Theater This week
                  HAPPY POTTER (Ⅲ)
American film
Director (导演): Alfonso Carom
Stars: Daniel Redcliffe, Rupert Grint. Emma Waston
Time: From Monday to Wednesday. At 6:00 p.m
Ticket Price: $ 4.5
                        KUNGFU HUSTLE
Chinese Hong Kong film
Director: Zhou Xingchi
Stars: Zhou Xingchi, Yuan Hua. Liang Xiaolong
Time: From Wednesday to Friday, at 9:00 p.m.
Ticket Price: $ 5
                  A WORLD WITHOUT THIEVES
Chinese film Director: Feng Xiaogang
Stars: Liu Dehua, Liu Ruoying, Ge You, Li Bingbing
Time: From Friday to Sunday, at 6:30 p.m.
Ticket Price: $ 6 (Half on Sunday for children)
                               TROY
American film Director: Wolfgang Peterson
Stars: Julian Glover, Brian Cox, Nathan Jones, Adoni Maropis
Time: From Tuesday to Saturday, at 9:30 a.m.
Ticket Price: $5.5
1.There will be ______ in Grand Movie Theater this week.
A. one Chinese film
B. two Chinese films
C. three American films
D. a lot of foreign films
2. If a man with his child goes to Grand Movie Theater on Sunday, they will pay ______ for the film.
A. $12
B. $9
C. $6
D. $5
3. If you are free on Friday morning, you can see the film in Grand Movie Theater.
A. KUNGFU HUSTLE
B. A WORLD WTTHOUT THIEVES
C. TROY D.HAPPY POTTER(Ⅲ)
4. You can see three films either on ______ or on ______.
A. Wednesday; Friday
B. Tuesday; Wednesday
C. Thursday; Friday
D. Saturday; Sunday
5. From the poster, we know ______ is a director and actor in the film.
A. Alfonso Cuaron
B. Feng Xiaogang
C. Wolfgang Peterson
D. Zhou Xingchi
多项选择题