For a weak acid HA with dissociation constant | vedclass

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Question

(d) Dissociation constant of $HA = {10^{ - 9}}$

$HA⇌{H^ + } + {A^ - }$

$[{H^ + }] = \sqrt {\frac{{{K_a}}}{C}} $ $ = \sqrt {\frac{{{{10}^{ - 9}}}

Vedclass · Accepted Answer

$9$

Vedclass · Answer

(d) Dissociation constant of $HA = {10^{ - 9}}$

$HA⇌{H^ + } + {A^ - }$

$[{H^ + }] = \sqrt {\frac{{{K_a}}}{C}} $ $ = \sqrt {\frac{{{{10}^{ - 9}}}}{{0.1}}} $ ; $[{H^ + }] = {10^{ - 5}}$

$	herefore \,pH = 5$

$pH+pOH = 14$

$pOH = 14 - pH$$ = 14 - 5$ ; $pOH = 9$

For a weak acid $HA$ with dissociation constant ${10^{ - 9}},\,\,pOH$ of its $0.1 \,M$ solution is

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