SATHEE: Equilibrium Question 247

Equilibrium Question 247

Question: 0.5 M ammonium benzoate is hydrolysed to 0.25 percent, hence its hydrolysis constant is [MH CET 2004]

Options:

A) $2.5 \times 10^{- 5}$

B) $1.5 \times 10^{- 4}$

C) $3.125 \times 10^{- 6}$

D) $6.25 \times 10^{- 4}$

Show Answer

Answer:

Correct Answer: C

Solution:

$C_{6} H_{5} C O O N H_{4} \to C_{6} H_{5} C O O^{-} + N H_{4}^{+}$

$0.5 - \frac{.25}{100}$

$\frac{.25}{100}$

$\frac{.25}{100}$ According to Ostwald dilution law. $K = \frac{α^{2} C}{1 - α}$

$(∴ α = \frac{.25}{100})$

$K = α^{2} C$

$(∵ 1 - α = Very small)$

$K = \frac{.25}{100} \times \frac{.25}{100} \times .5$ ; $K = 3.125 \times 10^{- 6}$

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Equilibrium Question 247

Question: 0.5 M ammonium benzoate is hydrolysed to 0.25 percent, hence its hydrolysis constant is [MH CET 2004]

Options:

Answer:

Solution:

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