Answer:
(a) Acid
(b) Base
(c) Both
(d) Both
Explanation:
A Brønsted-Lowry acid is an H⁺ donor.
A Brønsted-Lowry base is an H⁺ acceptor.
(a)
HI is an acid according to the following equation.
HI + H₂O ⇄ I⁻ + H₃O⁺
(b)
CH₃COO⁻ is a base according to the following equation.
CH₃COO⁻ + H₂O ⇄ CH₃COOH + OH⁻
(c)
H₂PO₄⁻ is an acid according to the following equation.
H₂PO₄⁻ + H₂O ⇄ HPO₄²⁻ + H₃O⁺
H₂PO₄⁻ is a base according to the following equation.
H₂PO₄⁻ + H₂O ⇄ H₃PO₄ + OH⁻
(d)
HSO₄⁻ is an acid according to the following equation.
HSO₄⁻ + H₂O ⇄ SO₄²⁻ + H₃O⁺
HSO₄⁻ is a base according to the following equation.
HSO₄⁻ + H₂O ⇄ H₂SO₄ + OH⁻
