Question

The molarity of 10 ml of 22.4 V H2 O2 is

Answer 1

Answer:

X11.2

Explanation:

Concentration of commercially available H2O2 solutions (as in pharmacy etc) is expressed as “X volume H2O2” solution(where X is a number). It means, 1 volume of such solution will give X volume of O2 at STP when completely decomposed (H2O2 is unstable and would eventually decompose to give H2O and O2).

Now, Let us assume, 1 litre of such solution produces X litres of O2 at STP.

Hence, moles of O2 = X/22.4

So, the original moles of H2O2 that were present in that solution as per the equation

H2O2→H2O+12O2

Moles of H2O2 =2X22.4=X11.2

And, the volume of that solution taken was = 1 liter

Therefore, Molarity =X11.2

Now, your question.