Calculate {H^ + } ion concentration in a 1.00,(M) ,HCN, litre solution ({Kₐ} = 4 × {10^{ - 10}})

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6-2.Equilibrium-II (Ionic Equilibrium)

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Calculate the ${H^ + }$ ion concentration in a $1.00\,(M)$ $\,HCN\,$ litre solution $({K_a} = 4 \times {10^{ - 10}})$

A

$4 \times {10^{ - 14}}\,mole/litre$

B

$2 \times {10^{ - 5}}\,mole/litre$

C

$2.5 \times {10^{ - 5}}\,mole/litre$

D

None of these

Solution

(b) $[{H^ + }] = \sqrt {K \times C} $

$[{H^ + }] = \sqrt {4 \times {{10}^{ – 10}} \times 1} $ ; $[{H^ + }] = 2 \times {10^{ – 5}}$ $mole/litre$

Standard 11

Chemistry

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