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Salt of Weak Acid and Strong Base

The pH of an ...

Question

The pH of an aqueous solution of sodium acetate is more than 7

A

True

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B

False

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Solution

The correct option is A True
Sodium acetate on hydrolysis gives a strong base + weak acid so its aqueous solution will be alkaline in nature. Thus the pH of an aqueous solution of sodium acetate is more than 7.

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Q. Assertion :The pH of an aqueous solution of acetic acid remains unchanged by the addition of sodium acetate. Reason: The ionisation of acetic acid is suppressed by the addition of sodium acetate.

Q. Classify aqueous solutions of the following substances according to their pH into three groups : 7, more than 7, less than 7.
Common salt, sodium acetate, hydrochloric acid, carbon dioxide, potassium bromide, calcium hydoxide, ammonium chloride, vinegar, sodium carbonate, ammonia.

Q. Assertion :The pH of an aqueous solution of sodium acetate is more than

7

. Reason: Sodium acetate is a salt of a weak acid (acetic acid) and a strong base (NaOH). It undergoes hydrolysis in aqueous solutions.

C H_{3} C O O N a + H_{2} O \to C H_{3} C O O H + N a^{+} + O H^{-}

Acetic acid is weak acid and is partially dissociated whereas NaOH is a strong base and completely dissociated.

Read the above assertion and reason and choose the correct option regarding it.

During the electrolysis of aqueous solution of sodium acetate, the nature of solution left in the vessel and its $P^{H}$ is

Q. The nature of an aqueous solution of sodium acetate

(C H_{3} C O O N a)

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Salt of Weak Acid and Strong Base

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