QJEEM22Ch4f0c: JEE Main 2022 Chemistry - Class 11 JEEM22Ch4f0c Solution: K a for butyric acid ( C 3 H 7 COOH ) is 2 × 10 − 5 . The pH of …

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QJEEM22Ch4f0c: JEE Main 2022 Chemistry - Class 11 JEEM22Ch4f0c Solution: K a for butyric acid ( C 3 H 7 COOH ) is 2 × 10 − 5 . The pH of …

$K_{a}$ for butyric acid $(C_{3} H_{7} COOH)$ is $2 \times 10^{- 5}$ . The $pH$ of $0.2 M$ solution of butyric acid is __________ $\times 10^{- 1}$ . (Nearest integer)

[Given $\log 2 = 0.30$ ]

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Accepted Answer

\mathrm{K}_{\mathrm{a}}

of Butyric acid

\Rightarrow 2 \times 10^{-5} \,\mathrm{PKa}=4.7

\mathrm{pH}

of

0.2 \mathrm{M}

solution,

pH = \frac{1}{2} {pK}_{a} - \frac{1}{2} \log C

\begin{aligned} = \frac{1}{2} (4 \cdot 7) - \frac{1}{2} \log (0.2) \\ = 2.35 + 0.35 = 2.7 \end{aligned}

pH = 27 \times 10^{- 1}

QJEEM22Ch4f0c: JEE Main 2022 Chemistry - Class 11 JEEM22Ch4f0c Solution: K a for butyric acid ( C 3 H 7 COOH ) is 2 × 10 − 5 . The pH of …

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