Buffer solution can be obtained by mixing aqueous solution of _______.
A
Sodium acetate and excess of HCl
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B
Sodium acetate and acetic acid
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C
Sodium chloride and HCl
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D
Acetic acid and excess of NaOH
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Solution
The correct option is C Sodium acetate and acetic acid A mixture of acetic acid (a weak acid) and sodium acetate ( its salt with strong base sodium hydroxide) acts as acidic buffer.
Option A, C and D does not contain weak acid/weak base and its salt thus it does not form buffer solution.