The dissociation constant of an acid HA | vedclass

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Question

(c) $HA$ $ ightleftharpoons $ ${H^ + } + {A^ - }$

$[{H^ + }] = 0.1\,\,M$; ${[{H^ + }]^2} = {K_a} 	imes C$

$[{H^ + }] = \sqrt {{K_a} 	imes C}

Vedclass · Accepted Answer

$3$

Vedclass · Answer

(c) $HA$ $ ightleftharpoons $ ${H^ + } + {A^ - }$

$[{H^ + }] = 0.1\,\,M$; ${[{H^ + }]^2} = {K_a} 	imes C$

$[{H^ + }] = \sqrt {{K_a} 	imes C} = \sqrt {1 	imes {{10}^{ - 5}} 	imes 0.1} = \sqrt {{{10}^{ - 6}}} $

$[{H^ + }] = {10^{ - 3}}M;\,\,pH = 3$

The dissociation constant of an acid $HA$ is $1 \times {10^{ - 5}}$. The $pH$ of $0.1$ molar solution of the acid will be

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