Chemistry Grade 12 Unit 1: Acid-Base Equilibrium 21. Which of the following salts will produce an acidic solution when dissolved in water? A. NH₄Cl B. NaNO₃ C. KCH₃COO D. Na₂SO₄ Answer: A Explanation: NH₄Cl is a salt of a strong acid (HCl) and a weak base (NH₃…
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Chemistry Grade 12 Unit 1: Acid-Base Equilibrium 11. What is the pOH of a solution with a hydrogen ion concentration [H⁺] of 1.0 × 10⁻⁹ M at 25 °C? A. 9 B. 7 C. 5 D. 4 Answer: C Explanation: First, find the pH: pH = -log(1.0 × 10⁻⁹) = 9. Since pH + pOH = 14 at…
Chemistry Grade 12 Unit 1: Acid-Base Equilibrium 1. According to the Arrhenius concept, an acid is defined as a substance that: A. produces H⁺ ions in aqueous solution B. donates a proton to another substance C. accepts an electron pair D. produces OH⁻ ions in…
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