Question

# Assertion: On mixing equal volumes of 1 M $$HCl$$ and of 2 M $$CH_3COONa$$, an acidic buffer solution is formed.Reason: The resultant mixture contains $$CH_3COOH$$ and $$CH_3COONa$$ which are parts of acidic buffer.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Assertion is incorrect but Reason is correct
E
Both Assertion and Reason are incorrect

Solution

## The correct option is B Both Assertion and Reason are correct and Reason is the correct explanation for AssertionA solution that resists change in pH value upon addition of small amount of strong acid or base (less than 1 %) or when solution is diluted is called buffer solution.Acidic buffer solution : An acidic buffer solution consists of solution of a weak acid and its salt with strong base. The best-known example is a mixture of solution of acetic acid and its salt with strong base $$(CH_3COONa)$$.Reaction:$$CH_3COONa + HCl \rightarrow CH_3COONa + CH_3COOH$$      2               1                        -                     -    1                   -                                         1                          1which are parts of acidic bufferChemistry

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