Worked Examples · Example 9.5
Q.Calculate the strength of 10 volume solution of hydrogen peroxide.
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Start your 14-day free trial to unlock the full solution →Meaning of "10 volume": 1 litre of the H2O2 solution, on complete decomposition, liberates 10 litres of O2 gas measured at STP.
Step 1 — moles of O2 liberated per litre of solution:
Step 2 — relate to moles of H2O2 using the decomposition equation:
2 mol H2O2 gives 1 mol O2, so:
Step 3 — convert to mass (strength in g/L):
Molar mass of H2O2 = 34 g/mol
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