\(h=\sqrt{\frac{{{K}_{w}}}{{{K}_{a}}\times {{K}_{b}}}}=\sqrt{\frac{{{10}^{-14}}}{{{10}^{-5}}\times {{10}^{-5}}}}=\,\,\sqrt{{{10}^{-14}}\times {{10}^{+10}}}=\sqrt{{{10}^{-4}}}={{10}^{-2}}\)
${H_2}{O_2}\, + \,{H_2}O\, \rightleftharpoons \,{H_3}{O^ + }\, + \,HO_2^ - $