Answers: 1
![Ka = \frac{[H+][ClO-]}{[HClO]}](/tpl/images/0721/9838/ef45a.png)
![[H+] = a = 2.120 \times 10^{-5} M](/tpl/images/0721/9838/b6a0d.png)
![= \frac{[H+]}{[HClO]}_{initial} \times 100\%\\\\= 2.120 \times 10^{-5}\div0.015 \times 100\%](/tpl/images/0721/9838/3381a.png)
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