The volume strength of the H₂O₂ solution is: | TestHub

Passage / Comprehension

The strength of a hydrogen peroxide (H₂O₂) sample is generally expressed in terms of its volume strength. This refers to the volume of oxygen liberated at N.T.P. (Normal Temperature and Pressure) by heating one volume of hydrogen peroxide. The concentration of H₂O₂ in a solution can also be expressed as a percentage of H₂O₂ in the solution. The normality of this solution can be calculated if the equivalent mass of H₂O₂ is known.

The volume strength of the H₂O₂ solution is:

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Answer:

Solution:

H₂O₂ + 2KI + H₂SO₄ → K₂SO₄ + I₂ + 2H₂O

I₂ + Na₂S₂O₃ → 2NaI + Na₂S₄O₆

4 mmol of hypo means 2 mmol of I₂ and 2 mmol of H₂O₂.

So, molarity = $\frac{2}{25}$ , normality = $\frac{4}{25} = 0.16 N$

And volume strength = $\frac{2}{25} \times 11.2 V = 0.896 V$

Chemistry - Concentration Terms Question with Solution | TestHub

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