Statement (I) : A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities.

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Q.
Given below are two statements:

Statement (I) : A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities.

Statement (II) : Blood is naturally occurring buffer solution whose pH is maintained by $H_{2} {CO}_{3} / {HCO}_{3}^{-}$ concentrations.

In the light of the above statements, choose the correct answer from the options given below. [2024]

1 Both Statement I and Statement II are false

2 Statement I is true but Statement II is false

3 Statement I is false but Statement II is true

4 Both Statement I and Statement lI are true

Ans.
(3)

Acidic buffer: solution of weak acid and its salt with strong base.

This buffer is effective in the range $0.1 < \frac{[acid]}{[salt]} < 10$

Basic buffer: solution of weak base and its salt with strong acid.

This buffer is effective in the range $0.1 < \frac{[base]}{[salt]} < 10$

Solution

1 Both Statement I and Statement II are false

2 Statement I is true but Statement II is false

3 Statement I is false but Statement II is true

4 Both Statement I and Statement lI are true

Ans.
(3)

Acidic buffer: solution of weak acid and its salt with strong base.

This buffer is effective in the range $0.1 < \frac{[acid]}{[salt]} < 10$

Basic buffer: solution of weak base and its salt with strong acid.

This buffer is effective in the range $0.1 < \frac{[base]}{[salt]} < 10$

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Solution

1 Both Statement I and Statement II are false

2 Statement I is true but Statement II is false

3 Statement I is false but Statement II is true

4 Both Statement I and Statement lI are true

Ans. (3) Acidic buffer: solution of weak acid and its salt with strong base. This buffer is effective in the range 0.1<[acid][salt]<10 Basic buffer: solution of weak base and its salt with strong acid. This buffer is effective in the range 0.1<[base][salt]<10

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Ans.
(3)

Acidic buffer: solution of weak acid and its salt with strong base.

This buffer is effective in the range $0.1 < \frac{[acid]}{[salt]} < 10$

Basic buffer: solution of weak base and its salt with strong acid.

This buffer is effective in the range $0.1 < \frac{[base]}{[salt]} < 10$