Assertion :The $p H$ of an aqueous solution of acetic acid remains unchanged on the addition of sodium acetate. Reason: The ionization of acetic acid is suppressed by the addition of sodium acetate due to common ion effect.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
Sodium acetate is a strong electrolyte and acetic acid is a weak electrolyte. When sodium acetate is added to the acetic acid solution, the ionization of the acetic acid is suppressed due to the common ion effect.
Sodium acetate provides acetate ion which is common to acetic acid. Due to the suppression of the ionization of acetic acid, the hydrogen ion concentration decreases. This increases the $p H$ of the solution.

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Similar questions

Q. Assertion :Assertion : The pH of an aqueous solution of acetic acid remains unchanged on addition of sodium acetate. Reason: Reason : The ionization of acetic acid is increased by addition of sodium acetate.

Read the assertion and reason carefully to mark the correct option out of the options given below :

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(d) If the assertion and reason both are false.

(e) If assertion is false but reason is true.

Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.

Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.
Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

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Assertion :The pH of an aqueous solution of acetic acid remains unchanged on the addition of sodium acetate. Reason: The ionization of acetic acid is suppressed by the addition of sodium acetate due to common ion effect.

Assertion :The $p H$ of an aqueous solution of acetic acid remains unchanged on the addition of sodium acetate. Reason: The ionization of acetic acid is suppressed by the addition of sodium acetate due to common ion effect.