Conjugate Acid-Base Pairs Worksheet
Grade 12 Chemistry worksheet focusing on identifying and understanding conjugate acid-base pairs in various reactions.
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Conjugate Acid-Base Pairs
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Read each question carefully and provide your answers in the space provided. Show all your work for calculations.
1. Which of the following is the conjugate base of H₂SO₄?
SO₄²⁻
HSO₄⁻
H₃O⁺
H₂SO₃
2. In the reaction: NH₃ + H₂O ⇌ NH₄⁺ + OH⁻, what is the conjugate acid-base pair?
NH₃ / H₂O
H₂O / OH⁻
NH₄⁺ / OH⁻
NH₃ / OH⁻
3. A conjugate acid is formed when a base a proton.
4. The conjugate base of a strong acid is a base.
5. In an acid-base reaction, the acid donates a proton and becomes its base.
6. Identify the conjugate acid-base pairs in the following reaction:
HCO₃⁻(aq) + H₂O(l) ⇌ H₂CO₃(aq) + OH⁻(aq)
7. Explain the relationship between the strength of an acid and the strength of its conjugate base.
Match each acid with its correct conjugate base.
8. HCl
a. CN⁻
9. H₂S
b. Cl⁻
10. HCN
c. HS⁻
11. Water can act as both an acid and a base.
True
False
12. A strong acid has a strong conjugate base.
True
False
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