Grade 12 Acid-Base Theories Worksheet
Explore Grade 12 acid-base theories including Arrhenius, Brønsted-Lowry, and Lewis definitions, conjugate pairs, and pH calculations.
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Acid-Base Theories
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Read each question carefully and provide concise, accurate answers based on your understanding of acid-base theories. Show all your work for calculations.
1. Which of the following is an Arrhenius acid?
NH₃
NaOH
H₂SO₄
CH₃COOH
2. According to Brønsted-Lowry theory, an acid is a substance that:
produces H⁺ ions in solution.
accepts a proton.
donates an electron pair.
donates a proton.
3. A Lewis acid is an electron pair .
4. The conjugate base of H₂S is .
5. Explain the key difference between an Arrhenius base and a Brønsted-Lowry base.
6. Identify the conjugate acid-base pairs in the following reaction:
NH₃(aq) + H₂O(l) ⇌ NH₄⁺(aq) + OH⁻(aq)
7. All Brønsted-Lowry acids are also Arrhenius acids.
True
False
8. The pH of a neutral solution at 25°C is 7.
True
False
9. Calculate the pH of a 0.015 M HCl solution. Show your calculations.
10. A solution has a [OH⁻] concentration of 1.0 x 10⁻⁴ M. Determine its pOH and pH.
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