Chapter 27

Dilute aqueous hydrogen peroxide is sold commercially to the cosmetic and health care industries as '10-Volume Hydrogen Peroxide'. This means that one volume of solution will decompose to give ten volumes of oxygen at STP. From the following analytical data calculate the concentration (\% w/v) of '10-Volume Hydrogen Peroxide'. '10-volume Hydrogen Peroxide' (25.00 \(\mathrm{mL}\) ) was dissolved in water and made up to \(250.00 \mathrm{~mL}\). This solution \((25.00 \mathrm{~mL})\) was titrated with a \(\mathrm{KMnO}_{4}\) solution ( \(48 \mathrm{~mL} ; 0.02 \mathrm{M}\) ) to a palepink end-point in the presence of dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\).