Volume strength of hydrogen peroxide solution (Volume strength (×) = 11.2 × M, where M is molarity of H2O2 (mol/L) and ‘volume strength’)
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Volume strength (×) = 11.2 × M, where M is molarity of H2O2 (mol/L) and ‘volume strength’ is the textbook definition linked to O2 at STP from decomposition.
What each symbol means
| Symbol | What it stands for |
|---|---|
| M | Molar concentration of H2O2 (mol L⁻¹) |
| 11.2 | L of O2 at STP per mole of H2O2 in the stoichiometry used for this JEE relation (½ mol O2 per mol H2O2 → 11.2 L per mol H2O2) |
| Volume strength | Numerical label used in NCERT-style problems (not SI) |
When to use this
Ideal gas at STP 22.4 L/mol; reaction framed as 2H2O2 → 2H2O + O2 so 1 mol H2O2 yields ½ mol O2 = 11.2 L at STP per mole of H2O2 in solution.