In $0.1{\mathrm{MH}}_2{\mathrm{SO}}_4$ acid solution, the concentration of ${\mathrm{H}}_3{\mathrm{O}}^{+}$ at ${25}^{\circ }\mathrm{C}$ will

Since ${\mathrm{HSO}}_4^{-}$ is weak acid $\left(K_{\mathrm{a}}=0.013\mathrm{M}\right)$, the concentration of ${\mathrm{H}}_3{\mathrm{O}}^{+}$ will be slightly larger than 0.1 M. 

A weak acid having the chemical formula CH3COOH is acetic acid, commonly referred to as ethanoic acid. It is recognised as the substance that makes vinegar, a solution of acetic acid in water that ranges from 4 to 7 percent, work. Because it dissolves in water only partially into its component ions, acetic acid is a weak acid.