Question

. A solution of H O2 2 is 0.18 N .Its % (w/v) strength is​

Answer 1

Answer:

We know,

Volume strength =11.2× molarity =11.2

⇒ molarity =1M

⇒ strength =34g/L

⇒%w/w=

1000

34

×100=3.4%

Correct option: (B) 3.4%

Answer 2

Explanation:

3N means 3 g eqwt. in 1 L solution.

N=

eq. wt.

weight

.

(eq. wt. for hydrogen peroxide=17 g)

Therefore, 3=

17

wt

or wt=3×17=51 g.

Now, from the equation, we know that 68 g of H

2

O

2

gives 22.4 L of Oxygen.

Therefore, 51 g of hydrogen peroxide gives 22.4×

68

51

=16.8 L.

Thus, volume strength is 16.8 L, because volume strength is the volume of oxygen at STP given by one volume sample of hydrogen peroxide on heating