• # question_answer lonization constants ${{K}_{a}}$ for formic acid and acetic acid are $17\cdot \,7\times {{10}^{-5}}$ and $1\cdot 77\times {{10}^{-5}}$. Which acid is stronger and how many times the other if equimolar concentrations of the two are taken?

Answer:

${{K}_{a}}$ for $HCOOH>{{K}_{a}}$ for $C{{H}_{3}}COOH$. Hence, formic acid is stronger. $\text{Further,}\,\,\frac{\text{Strength}\,\text{of}\,\text{HCOOH}}{\text{Strength}\,\text{of}\,\text{C}{{\text{H}}_{\text{3}}}\text{COOH}}$$\,=\sqrt{\frac{{{\text{K}}_{\text{HCOOH}}}}{{{\text{K}}_{\text{C}{{\text{H}}_{\text{3}}}\text{COOH}}}}}\,=\sqrt{10}\,=3\cdot 16\,\text{times}.$

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