Conjugate Acids and Bases Worksheet
Explore the concepts of conjugate acids and bases, Brønsted-Lowry theory, and their applications in chemical reactions at a Grade 12 level.
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Conjugate Acids and Bases
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Read each question carefully and provide your best answer. Show all your work for calculations.
1. Which of the following is the conjugate base of H₂SO₄?
HSO₄⁻
SO₄²⁻
H₃O⁺
OH⁻
2. According to the Brønsted-Lowry theory, an acid is defined as a substance that:
Accepts a proton
Donates a proton
Produces H⁺ ions in solution
Produces OH⁻ ions in solution
3. A conjugate acid-base pair differs by only one .
4. In the reaction: NH₃ + H₂O ⇌ NH₄⁺ + OH⁻, NH₃ acts as a and NH₄⁺ is its .
5. Identify the conjugate acid and conjugate base pairs in the following reaction:
HCO₃⁻(aq) + H₂O(l) ⇌ H₂CO₃(aq) + OH⁻(aq)
6. Explain what an amphoteric substance is and provide an example.
Match each term with its correct definition.
7. Brønsted-Lowry Acid
a. Accepts a proton
8. Brønsted-Lowry Base
b. Formed when a base accepts a proton
9. Conjugate Acid
c. Donates a proton
10. Conjugate Base
d. Formed when an acid donates a proton
11. A strong acid has a weak conjugate base.
True
False
12. Water can act as both an acid and a base.
True
False
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