Question

The normality of 10 ml of a '20.V' H2O2, solution is -
(1) 1.79
(2) 3.58
(3) 60.86​

Answer 1

Answer:

20VH2O2 means that 1 litre of H2O2 solution would produce 20 litres of Oxygen.

2H2O2.....................>H2O+ O2

From the equation, it is clear that 2 moles of H2O2 produce 1 mol of O2

But 20V H2O2 will produce 20 litres of oxygen for 1 litre of H2O2.

............................................⇒ (20litre/24.4litre) mol of oxygen liberated for 1 litre of H2O2

So in a 1-litre solution of H2O2, moles of H2O2=2*moles of oxygen = (2*20/24.4) mol/litre=1.67M

n-factor of H2O2=2 

So, normality=Molarity*n-factor=1.67*2=3.34 N.

Explanation:

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