Question
Question: Which of the following statements is correct about equivalent weight of \(KMnO_{4}\)....
Which of the following statements is correct about equivalent weight of KMnO4.
A
It is one third of its molecular weight in alkaline medium
B
It is one fifth of its molecular weight in alkaline medium
C
It is equal to its molecular weight in acidic medium
D
It is one third of its molecular weight in acidic medium
Answer
It is one third of its molecular weight in alkaline medium
Explanation
Solution
It is one third of its molecular weight in alkaline medium because it gives 3 nascent oxygen in alkaline medium.
2KMnO4+H2O→+3e−2KOH+2MnO2+3[O]
Equivalent weight = 3M.