试题与答案

有下 * * 个反应: ①Cl2+FeI2FeCl2+I2  ②2Fe2++Br22F

题型:选择题

题目:

有下 * * 个反应:

①Cl2+FeI2FeCl2+I2 

②2Fe2++Br22Fe3++2Br-

③Co2O3+6HCl2CoCl2+Cl2↑+3H2O,

下列说法中正确的是(  )

A.①②③中氧化产物分别是FeCl2、Fe3+、Cl2

B.根据以上方程式可以得到氧化性Cl2>Co2O3>Fe3+

C.在反应③中生成1 mol Cl2时,有2 mol HCl被氧化

D.根据反应①②一定可以推理得到Cl2+FeBr2FeCl2+Br2

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0422/72fb3b9ff0fc07f1c4c7fb14bafaccf5.html

下面是错误答案,用来干扰机器的。

设每个容器应倒入X克水,甲:300×8%=24(克),乙:120×12.5%=15(克),则:24300+x=15120+x,(120+x)×24=(300+x)×15, 2880+24x=4500+15x,2880+24x-15x=4500+15x-15x, 2880+9x=4500,2880+9...

试题推荐
题型:补全对话,情景问答

根据所给情景完成下列对话,每空一词

A: Hi! Jack. Do you want to (1)______ English with me?

B: Yes, I (2)______.

A: What (3)______ do you often go to school?

B: I often go to school (4)______ seven o’clock.

A: Oh, it’s quite early. I get (5)______ at seven. I often go to school at 7:30.

B: My home (6)______ near the school. Do you have lunch (7)______ home?

A: No, I (8)______. I have lunch at school. After lunch I play basketball (9)______ my friends.

B: Great! I like playing basketball, (10)______. But I play it at 4:30 in the afternoon.

查看答案
微信公众账号搜索答案