Calculate the molarity (mol/L) of a 5% hydrogen peroxide (H2O2) solution. (5% indicates there are 5 g solute per 100 g solvent.) The molar mass of hydrogen peroxide is 34.01 g/mol. Assume the density of water is 1 g/mL. Report your answer to 2 decimal places.
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Step 1
Given that the solution is 5% hydrogen peroxide, we have 5g of H2O2 per 100g of solution. So, for a 100g solution, the mass of H2O2 is 5g. Show more…
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I need to convert the given mass percent H2O2 to molarity in L. These are the values I have: Mass solution = 100g Mass solute = 15% Density = 1.03g/mL H2O2 Mass = 34.0147g/mol
Madhur L.
Household hydrogen peroxide is an aqueous solution containing 3.0% hydrogen peroxide by mass. What is the molarity of this solution? (Assume a density of 1.01 g>mL.)
The concentration of a hydrogen peroxide solution can be conveniently determined by titration against a standardized potassium permanganate solution in an acidic medium according to the following equation: $$\begin{aligned} &2 \mathrm{MnO}_{4}^{-}+5 \mathrm{H}_{2} \mathrm{O}_{2}+6 \mathrm{H}^{+} \longrightarrow\\ &&5 \mathrm{O}_{2}+2 \mathrm{Mn}^{2+}+8 \mathrm{H}_{2} \mathrm{O} \end{aligned}$$ If $36.44 \mathrm{mL}$ of a $0.01652 \mathrm{M} \mathrm{KMnO}_{4}$ solution are required to oxidize $25.00 \mathrm{mL}$ of a $\mathrm{H}_{2} \mathrm{O}_{2}$ solution, calculate the molarity of the $\mathrm{H}_{2} \mathrm{O}_{2}$ solution.
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