A) 392
B) 31.6
C) 278
D) 156
Correct Answer: A
Solution :
Mohrs salt is\[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\cdot FeS{{O}_{4}}\cdot 6{{H}_{2}}O\cdot \]The equation is \[5F{{e}^{2+}}+MnO_{4}^{-}+8{{H}^{+}}\xrightarrow{{}}\] \[5F{{e}^{3+}}M{{n}^{2+}}+4{{H}_{2}}O\] Total change in oxidation number of iron \[=(+3)-(+2)\] \[=+1\] So, equivalent wt. of Mohrs salt \[=\frac{mol.\,\,wt.\,\,of\,\,Mohrs\,\,salt}{change\,\,in\,\,oxidation\,\,number}\] \[=\frac{392}{1}=392\]
You need to login to perform this action.
You will be redirected in
3 sec
