AP EAMCET202124 Aug 2021Morning ShiftChemistryIonic EquilibriumActual

Which among the following pair constitute a buffer?

Options

ALiOH and LiCl
BHNO ₃ and NH ₄ NO ₃
CHNO ₂ and NaNO ₂
DHBr and KBr

Correct answer

C. HNO ₂ and NaNO ₂

Step-by-step solution

Buffer solution consists of mixture of weak acids and their salts or weak base and their salts. LiOH is a strong base whereas HNO ₃ and HBr are strong acids. HNO ₂ is a weak acid and NaNO ₂ is a salt formed by combination of weak acid ( HNO ₂ ) and strong base ( NaOH ) . Buffer = HNO ₂+ NaNO ₂ .

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