Chemical And Ionic Equilibrium Result Question 38
38. A buffer solution can be prepared from a mixture of
$(1999,3 M)$
(a) sodium acetate and acetic acid in water
(b) sodium acetate and $\mathrm{HCl}$ in water
(c) ammonia and ammonium chloride in water
(d) ammonia and sodium hydroxide in water
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Answer:
Correct Answer: 38. ( a,b,c )
Solution:
- $\mathrm{CH} _3 \mathrm{COOH}+\mathrm{CH} _3 \mathrm{COONa}=$ Buffer solution
$ \mathrm{CH} _3 \mathrm{COONa}+\mathrm{HCl} \longrightarrow \mathrm{CH} _3 \mathrm{COOH}+\mathrm{NaCl} $
If $\mathrm{HCl}$ is taken in limited quantity, final solution will have both $\mathrm{CH} _3 \mathrm{COOH}$ and $\mathrm{CH} _3 \mathrm{COONa}$ needed for buffer solution.
Ammonia and ammonium chloride forms basic buffer.
BETA
