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Buffer Solutions

Which of the ...

Question

Which of the following mixtures will be buffer?

A

{C H}_{3} C O O H + {C H}_{3} C O O {N H}_{4}

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B

H C l + N a C l

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C

Borax+boric acid

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D

{C H}_{3} C O O H + {C H}_{3} C O O N a

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Solution

The correct options are
C ${C H}_{3} C O O H + {C H}_{3} C O O N a$
D Borax+boric acid

A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.

An acidic buffer solution is simply one which has a pH less than 7. Acidic buffer solutions are commonly made from a weak acid and one of its salts - often a sodium salt.EX: $C H_{3} C O O H + C H_{3} C O O N a$

An alkaline buffer solution has a pH greater than 7. Alkaline buffer solutions are commonly made from a weak base and one of its salts.EX: Borax and boric acid.
Hence option C, D are correct.

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Similar questions

Q. Which of the following will not function as a buffer solution?

(i)

N a C l

N a O H

(i i)

N a O H

{N H}_{4} O H

(i i i)

{C H}_{3} C O O {N H}_{4}

H C l

(i v)

Borax and boric acid

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. 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. Assertion :Mixture of

{C H}_{3} C O O H

{C H}_{3} C O O {N H}_{4}

is not a buffer solution. Reason: Acid buffer contains the mixture of weak acid and its salt with strong base.

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