Question
An acidic buffer solution can be prepared by mixing the solutions of
A.
ammonium acetate and acetic acid
B.
ammonium chloride and ammonioum hydroxide
C.
sulphuric acid and sodium sulphate
D.
sodium chloride and sodium hydroxide.
Answer :
ammonium acetate and acetic acid
Solution :
NOTE: Acidic buffer is mixture of weak acid and its salt with common anion.
$$\left( {\text{A}} \right)\,C{H_3}COOH + C{H_3}COON{H_4}$$ is acidic buffer.
$$\left( {\text{B}} \right)\,N{H_4}Cl + N{H_4}OH$$ is basic buffer.
$$\left( {\text{C}} \right)\,{H_2}S{O_4} + N{a_2}S{O_4}$$ is not buffer because both the compounds are strong electrolytes.
$$\left( {\text{D}} \right)\,NaCl + NaOH$$ is not buffer solution because both compounds are strong electrolytes.