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Acidic Buffer Action

Which one of ...

Question

Which one of the following pairs of solution is not an acidic buffer?

A

H_{2} C O_{3}

and

N a_{2} C O_{3}

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B

H_{3} P O_{4}

and

N a_{3} P O_{4}

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C

H C l O_{4}

and

N a C l O_{4}

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D

C H_{3} C O O H

and

C H_{3} C O O N a

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Solution

The correct option is C $H C l O_{4}$ and $N a C l O_{4}$
A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.
A solution of $H C l O_{4}$ and $N a C l O_{4}$ is not an acidic buffer because strong acid with its salt cannot form a buffer solution.

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Q. Assertion: On mixing equal volumes of 1 M

H C l

C H_{3} C O O N a

, an acidic buffer solution is formed.
Reason: The resultant mixture contains

C H_{3} C O O H

C H_{3} C O O N a

which are parts of acidic buffer.

Q. Aqueous solution of

H N O_{3}, K O H, C H_{3} C O O H

C H_{3} C O O N a

of identical concentration are provided. The pair(s) of solution which forms buffer upon mixing is (are)

C H_{3} C O O H

C H_{3} C O O N a

buffer is 4.8. In which of the following conc. conditions, the buffer capacity will be maximum?

[C H_{3} C O O H]

[C H_{3} C O O N a]

Q. We have acidic buffer of

C H_{3} C O O N a

C H_{3} C O O H

. One or more of the following operations will not change pH
I : diluting the mixture ten times
II : adding some HCl
III : adding some NaOH
IV : adding equal moles of

C H_{3} C O O N a

C H_{3} C O O H

into the buffer.
Select correct alternate.

Q. Aqueous solutions of

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C H_{3} C O O N a

of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is (are)

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