MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Radhika Batra Grade: 11
        Hydrogen peroxide solution (20 mL) reacts quantitatively with a solution of KMnO4 (20 mL) acidified with dilute H2SO4. The same volume of the KMnO4 solution is just decolourised by 10 mL of MnSO4 in neutral medium simultaneously forming a dark brown precipitate of hydrated MnO2. The brown precipitate is dissolved in 10 mL of 0.2 M sodium oxalate under boiling condition in the presence of dilute H2SO4. Write the balanced equations involved in the reactions and calculate the molarity of H2O2.
3 years ago

Answers : (1)

Navjyot Kalra
askIITians Faculty
654 Points
										Sol. Meq of oxalate = 10 × 0.2 × 2 = 4

Meq of MnO2 formed = Meq of oxalate = 4
Meq of KMnO4 in 20 mL = 4
⇒ Normality of H2O2 × 20 = 4
⇒ Normality of H2O2 = 0.20 N
⇒ Molarity of H2O2 = 0.20/2 = 0.10 M
The balanced reactions are :
2KMnO4 + 5H2O2 + 3H2SO4 → 2MnSO4 + 502 + K2SO4 + 8H2O
MnO2 + Na2C2O4 + 2H2SO4 → MnSO4 + Na2SO4 + 2CO2 + 2H2O
3 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
Get extra Rs. 2,385 off
USE CODE: COUPON10
Get extra Rs. 413 off
USE CODE: COUPON10

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details