Chemistry - Concentration Terms Question with Solution | TestHub

$95\%{\mathrm{H}}_2{\mathrm{SO}}_4$ by weight means $100\mathrm{g}{\mathrm{H}}_2{\mathrm{SO}}_4$ solution contains $95\mathrm{g}{\mathrm{H}}_2{\mathrm{SO}}_4$ by mass. Molar mass of ${\mathrm{H}}_2{\mathrm{SO}}_4=98\mathrm{g}{\mathrm{mol}}^{-1}$ Moles in $95\mathrm{g}=\frac{95}{98}=0.969$ mole Volume of $100\mathrm{g}{\mathrm{H}}_2{\mathrm{SO}}_4$ $$\begin{array}{rl}& =\frac{\text{ mass }}{\text{ density }}=\frac{100\mathrm{g}}{1.834\mathrm{g}{\mathrm{cm}}^{-3}}\\ & =54.52{\mathrm{cm}}^3=54.52\times 10^{-3}\mathrm{L}\end{array}$$ $$\begin{array}{rl}\text{ Molarity }& =\frac{\text{ Moles of solute }}{\text{ Volme of solute in }\mathrm{L}}\\ & =\frac{0.969}{54.52\times 10^{-3}}=17.8\mathrm{M}\end{array}$$