HClO is a weak acid. The concentration of H^ + ions in 0.1 ,M sol… - Vidyadip

MCQ

$HClO$ is a weak acid. The concentration of ${H^ + }$ ions in $0.1\,M$ solution of $HClO\,({K_a} = 5 \times {10^{ - 8}})$ will be equal to

✓
$7.07 \times {10^{ - 5}}\,m$
B
$5 \times 10^{-9}\,\,m$
C
$5 \times {10^{ - 7}}\,m$
D
$7 \times {10^{ - 4}}\,m$

✓

Answer

Correct option: A.

$7.07 \times {10^{ - 5}}\,m$

(a) ${[{H^ + }]^2} = C\,.\,\alpha = 0.1 \times 5 \times {10^{ - 8}}$

${H^ + } = \sqrt {5 \times {{10}^{ - 9}}} = 7.07 \times {10^{ - 5}}$ $M.$

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