作者BIEGABOY (BIEGABOY)
看板TransBioChem
标题[问题] 两个小问题
时间Tue Jul 6 17:51:48 2010
1. For this balanced equation,
[Cu(NH3)4]2+ + [S2O4]2- +2H20 ---> Cu +2[SO3]2- +4[NH4]+
determine the number of electrons gained and lost, per atom， by the oxidizing
and reducing elements，respectively?
a.1，1 b.2，2 c.2，1 d.2，4
我是选c，因为题目有per atom??
2. The compond Mn02 is dound to be stable in the presence of HN03. Mn02
readily dissolves in HCl. Which statement best explains this behavior?
a.the nitrate ion cannot oxidize Mn02
b.Mn02 cannot oxidize the nitrate
c.the Cl- reduces Mn from 4+ to 2+
d.basic Mn02 is neutralized by HCl
a，b不知道选何者比较好??觉得是a...硝酸跟离子无法氧化Mn4+吧!!!
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 58.114.85.80
1F：推 lancerfin:你打错了......[S2O4]是2"-" 07/06 21:11
※ 编辑: BIEGABOY 来自: 118.171.45.157 (07/06 21:14)
2F：推 lancerfin:而且"[NH3]+" 哪来的"+" NH3就NH3 07/06 21:16
3F：推 lancerfin:[Cu(NH3)4]2+ +[S2O4]2- +2H20->Cu +2[SO3]2- +4NH3+2H+ 07/06 21:22
※ 编辑: BIEGABOY 来自: 114.39.6.168 (07/06 22:28)
4F：→ BIEGABOY:是NH4.. 07/06 22:29