题干

某种甲醇燃料电池是采用铂或碳化钨作为电极催化剂,在稀硫酸电解液中直接加入纯化后的甲醇,同时向一个电极通入空气.回答下列问题:

(1)这种电池放电时发生的化学方程式是____ 

(2)此电池的正极发生的电极反应式是____ 

(3)电解液中的H+____ 极移动;

(4)向外电路释放电子的电极是____ 极.

上一题 下一题 0.0难度 选择题 更新时间:2014-06-17 03:34:18

答案(点此获取答案解析)

2CH3OH+3O2═2CO2+4H2O,3O2+12H++12e═6H2O,正,负

同类题5

阅读下面短文,从各题所给的A、B、C、D四个选项中选出最佳选项。
A
Characters: Evan, Mrs Bordoni, Mr Contei, Rita, Marco, Tom
Setting: An elementary school
Mrs Bordoni: (Stands at the school gate) Good morning! You need to go straight to your classrooms, children. (A shy boy walks up, looking nervous) What is your name?
Evan: (Looking at the ground) My name is Evan.
Mrs Bordoni: Welcome to Northside. I'm the principal (校长), Mrs Bordoni.
Evan: (Looks surprised) Oh! Good morning.
Mrs Bordoni: I know you are new to our school, but you will like it here. I will take you to your classroom.
Evan: I didn't want to move and leave my friends.
Mrs Bordoni: You will have friends here. You'll see. Here's your room, 106.
Mr Cortez: Welcome to our class! I'm Mr Cortez.
Evan: (The class looks at him. He speaks softly.) Hello.
Mr Cortez: We are talking about a story we just read. Who can tell Evan what it was about?
Rita: This family moves to a new state. Their story is both funny and sad.
Evan: (Cheering up) Did they like the new place?
Marco: Not at first. But they made lots of new friends.
Mr Cortez: What happened to make them change their minds?
Tom: The girl from next door said he needed help. When they got to her house, a sign said, "Welcome".
Marco: It was a surprise party for them. The whole family was laughing.
Mr Cortez: The neighbors made the family feel welcome.
Mrs Bordoni: (Stands in the doorway) Evan, it's time for lunch. (They enter the lunchroom. A sign says, "Welcome Evan".) It is hard to change schools and leave old friends. Now, we are your friends. Evan: (Smiles) I can't believe you did this for me.