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Buffer Solutions

A mixture of ...

Question

A mixture of aqueous solution of sodium acetate and sodium propanoate forms a buffer solution.

A

True

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B

False

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Solution

The correct option is B False
The given statement "A mixture of aqueous solution of sodium acetate and sodium propanoate forms a buffer solution." is false. An acidic buffer solution contains weak acid and its salt with strong base. Following are examples of acidic buffer solutions.
(1) $C H_{3} C O O H + C H_{3} C O O N a$
(2) $C H_{3} C H_{2} C O O H + C H_{3} C H_{2} C O O N a$

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Similar questions

Q. Assertion :A mixture of sodium acetate and sodium propionate forms a buffer solution. Reason: A buffer solution reacts with small quantities of hydrogen or hydroxyl ions and keeps the pH almost same.

Q. A buffer solution can be prepared from a mixture of:
(i) Sodium acetate and acetic acid in water
(ii) Sodium acetate and hydrochloric acid in water
(iii) Ammonia and ammonium chloride in water
(iv) Ammonia and sodium hydroxide in water

What amount of sodium propanoate should be added to one litre of an aqueous solution containing 0.02 mole of propanoic acid

(K a = 1.34 \times 10^{- 5} a t 25^{0} C)

to obtain a buffer solution of pH 4.75 :

Q. What amount of sodium propanoate should be added to one litre of an aqueous solution containing

0.02 m o l e

of propanoic acid

(K_{a} = 1.34 \times 10^{- 5}

25^{\circ} C

) to obtain a buffer solution of

p H 4.75

.

Q. Assertion: A solution of sodium acetate and ammonium acetate can act as a buffer.
Reason: A buffer solution consists of a mixture of a weak acid and its conjugate base or vice versa.

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