Question

The strength of the 11.2 volume solution of H₂O₂ is ______.

[Given that molar mass of H = 1 g mol⁻¹ and O = 16 g mol⁻¹)

Options

• 13.6%

• 3.4%

• 34%

• 1.7%

Answer 1

The strength of the 11.2 volume solution of H₂O₂ is 3.4%.

Explanation:

11.2 V strength of H₂O₂ means,

11.2 L of O₂ is liberated at STP.

\[\ce{H2O2 -> H2O + 1/2O2}\]

11.2 L of O₂ at STP = 0.5 mol

∴ No. of moles of H₂O₂ = 1 mol

i.e., 1 L of given H₂O₂ solution has 1 mole of H₂O₂ (i.e., 34 g)

Strength = `34/1000 xx 100` = 3.4%