A) \[~C{{H}_{3}}COOH\text{ }+\text{ }C{{H}_{3}}COONa\]
B) \[C{{H}_{3}}COOH+\,\,{{C}_{H3}}COON{{H}_{4}}\]
C) \[C{{H}_{3}}COOH\text{ }+\text{ }N{{H}_{4}}Cl\]
D) \[NaOH+NaCl\]
Correct Answer: A
Solution :
A buffer solution is the solution which resist the change in pH on addition of small amount of acid or base. The ability of buffer solution to resist change in pH on addition of acid or base is called buffer action. May (i) Strong acid buffer: e.g., \[HCl,HN{{O}_{3}},{{H}_{2}}S{{O}_{4}}\]etc. (ii) Strong base buffer: e.g., NaOH, KOH etc. (iii) Weak acid buffer: It is a mixture of weak acid and its salt with strong base e.g., \[C{{H}_{3}}COOH+C{{H}_{3}}COONa.\] (iv) Weak base buffer: Mixture of weak base and its salt with strong acid e.g., \[N{{H}_{4}}OH+N{{H}_{4}}Cl.\] Buffer solutions play an important role in many industrial processes viz electroplating, manufacturing medicines, drugs etc. pH of a buffer solution can be calculated by using Henderson-Hassel Balch equation \[pH=p{{K}_{a}}+\log \frac{[salt]}{[acid]}\] \[pOH=pK{{ & }_{b}}+\log \frac{[salt]}{[base]}\]
You need to login to perform this action.
You will be redirected in
3 sec
