Which of the following pairs constitutes a buffer?
(a) NaOH and NaCl
(b) HNO₃ and NH₄NO₃
(c) HCl and KCl
(d) HNO₂ and NaNO₂
Answers
Answered by
1
Answer :- (b) HNO₃ and NH₄NO₃
Answered by
11
(d) HNO₂ and NaNO₂
Explanation:
Buffer solutions achieve their resistance to pH change because of the presence of an equilibrium between the acid and it's conjugate base or the base and it's conjugate acid.
From the given list, NaOH is a strong base and HCl and HNO3 are strong acids. So they cannot be used as buffers. HNO2 is weak acid and NaNO2 is a salt formed by the combination of weak acid HNO2 and a strong base NaOH. So HNO2 and NaNO2 can be used as buffer.
Option D is the answer.
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