Question

Which of the following statement is correct?

• A. Acidic buffer consist of a strong acid and its salt with weak base in a fixed proportion.
• B. $pH$ of the buffer solution changes by dilution.
• C. Natural buffer are the solution of salts of weak acid and weak base.
• D. Glycine + glycine hydrochloride is an example of acidic buffer.

Answer 1

Answer: (C)

Statement (c) is correct, while the other statements are incorrect.
Corrected form are as follows :
(a) Acidic buffer consists of a weak acid and its salt with strong base in a fixed proportion
e.g. $CH _{3} COOH + CH _{3} COONa$
(b) $pH$ of the buffer solution is not affected by dilution because ratio under the logarithmic terms remains unchanged.
(d) Glycine + glycine hydrochloride is an example of basic buffer.