Question

Molarity and Normality of 20 volume H2O2 solution is…. .

(1) 0.892 M, 3.57 N

(2) 1.787 M, 3.57 N

(3) 0.892 M, 1.785 N

(4) 3.57 M, 1.787 N​

Answer 1

Answer :

Volume strength of H₂O₂ = 20

We have to find molarity and normality of solution$.$

★ Volume strength of H₂O₂ solution :

• '10 volume' solution of H₂O₂ is 3.035% solution.
• Strength of '10 volume' H₂O₂ solution is 30.35 g/litre

Volume strength = 5.6 × N

or

Volume strength = 11.2 × M

➤ Molarity of solution :

⭆ V = 11.2 × M

⭆ 20 = 11.2 × M

⭆ M = 1.787 molar

➤ Normality of solution :

⭆ V = 5.6 × N

⭆ 20 = 5.6 × N

⭆ N = 3.57 normal

∴ (B) is the correct answer.

Cheers!