Analytical Chemistry Question 225
Question: In order to prepare one litre normal solution of KMnO4, how many gm of KMnO4 are required, if the solution is to be used in acid medium for oxidation
[MP PET 2002]
Options:
A) 158 gm
B) 31.60 gm
C) 62.0 gm
D) 790 gm
Show Answer
Answer:
Correct Answer: B
Solution:
In acidic medium 2 molecules of $ KMnO_4 $ gives 5 atoms of oxygen $ 2KMnO_4+3H_2SO_4\to K_2SO_4+2MnSO_4+3H_2O+5(O) $
$ 2\times 158=\frac{316\times 8}{80}=31.6 $ . So, equivalent wt. of $ KMnO_4 $ in acidic medium is = 31.6 gm
BETA
