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Question
Assertion (A): A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of \[\ce{pH}\] on addition of small amounts of acid or alkali.
Reason (R): A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution around \[\ce{pH}\] 4.75.
Options
Both A and R are true and R is correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
Both A and R are false.
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Solution
Both A and R are true and R is correct explanation of A.
Explanation:
The solutions which resist change in \[\ce{pH}\] on dilution or with the addition of small amounts of acid or alkali are called buffer solutions.
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