Conjugate Acid-Base Pairs Worksheet
Explore the concepts of conjugate acid-base pairs, Brønsted-Lowry theory, and identify acids, bases, and their conjugates in chemical reactions.
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Conjugate Acid-Base Pairs
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Read each question carefully and provide thoughtful answers based on your understanding of conjugate acid-base pairs.
1. Define a Brønsted-Lowry acid and a Brønsted-Lowry base. How are they related in a conjugate acid-base pair?
2. Explain what is meant by an amphoteric substance. Provide an example.
For each reaction, identify the acid, base, conjugate acid, and conjugate base.
a) HCl(aq) + H₂O(l) ⇌ H₃O⁺(aq) + Cl⁻(aq)
Acid: Base:
Conjugate Acid: Conjugate Base:
b) NH₃(aq) + H₂O(l) ⇌ NH₄⁺(aq) + OH⁻(aq)
Acid: Base:
Conjugate Acid: Conjugate Base:
1. Which of the following is the conjugate base of H₂SO₄?
SO₄²⁻
HSO₄⁻
H₃SO₄⁺
H₂SO₃
2. What is the conjugate acid of PO₄³⁻?
HPO₄²⁻
H₂PO₄⁻
H₃PO₄
P₂O₅
1. A conjugate acid always has one more proton than its conjugate base.
True
False
2. In the reaction: HCN + H₂O ⇌ H₃O⁺ + CN⁻, H₂O acts as an acid.
True
False
1. Write the chemical equation for the reaction of acetic acid (CH₃COOH) with water, and identify all conjugate acid-base pairs.
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