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Buffer Solutions

On the additi...

Question

On the addition of a small amount of an acid or a base, the pH value of a buffer solution:

A

increases

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B

decreases

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C

remains unaltered

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D

none of these

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Solution

The correct option is C
remains unaltered

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Similar questions

Q. Assertion: A buffer solution has a capacity to resist the change in pH value on an addition of a small amount of acid or base to it.
Reason: An aqueous solution of ammonium acetate can act as buffer.

Q. Assertion :When a small amount of an acid (or) base is added to water

p H

changes. Reason: Addition of acid or base increases the ionization of water.

Q. Assertion :When small amount of an acid or base is added to pure water its pH undergoes a change. Reason: Addition of an acid or a base increases the degree of ionisation of water.

Q. Choose the correct set of True/False for the following statements:
(i) Silver chloride is more soluble in very concentrated sodium chloride solution than in pure water.
(ii)The pH od a buffer solution does not change on addition of small amountof an acid or a base.

A buffer is a solution of weak acid and its conjugate base or a weak base and its conjugate acid. It resists the change in

p H

, when small amount of strong acid or base is added to it. Buffer solutions have wide applications.

H C l

gas is passed through an aqueous solution of 0.1M 1-aminopropane

(P r N H_{2})

p H

reaches 9.71. Calculate the ratio of

[P r N H_{2}] / [P r N H_{3}^{+}]

in this solution.

[K_{a} (P r N H_{3}^{+}) = 1.96 \times 10^{- 11}

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