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Which of these pairs of substances in aqueous solution would constitute a buffer?

a. HCl + KCl
b. KHPO4 + K2HPO4
c. KOH + KCl
d. HCl + KOH

1 answer

A buffer consists of
a. a weak acid and a salt of the weak acid.
b. a weak base and a salt of the weak base.

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