Question

Consider the following :
A. Sodium acetate
B. Acetic acid + Sodium acetate
C. Acetic acid
The pH of their equimolar aqueous solutions will be such that :

• A. C < B < A
• B. B < A < C
• C. A < B < C
• D. C < A < B

Answer 1

Answer: (A)

$A \rightarrow CH _{3} COONa \rightarrow$ Salt (aq. solution basic)
$B \rightarrow CH _{3} COOH / CH _{3} COONa$
$\rightarrow pH .$ of acidic buffer
$C \rightarrow CH _{3} COOH \rightarrow$ weak acid
$A > B > C$