Essential Chemistry for IGCSE - Acids And Bases (Section 1 - No. 42)
Which of the following pairs of compounds can form a buffer solution?
HCl and NaCl
CH₃COOH and CH₃COONa
NaOH and NaCl
H₂SO₄ and H₂O
Explanation
A weak acid and its conjugate base can form a buffer.
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