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pH of a Solution

Determine the...

Question

Determine the $p H$ of $0.024 M$ hydroxylane hydrochloride solution. $(K_{b}$ of hydroxylane is $10^{- 8})$

8.4

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6.2

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3.8

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5.6

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Solution

The correct option is C $3.8$
$H O + N H_{3} + H_{2} O ⇌ H O N H_{3} O H + H^{+}$
$K_{h} = \frac{K_{w}}{k_{b}} = \frac{10^{- 14}}{10^{- 8}} = 10^{- 6}$
$[H^{+}] = \sqrt{K_{h} C}$
$= \sqrt{10^{- 6} \times 0.024}$
$= 1.5 \times 10^{- 4}$ .

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