Bronsted-Lowry acids and bases and pH Quiz
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5 questions, one answer each
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1. Which species is the conjugate acid of the base NH₃?
- A. NH₂⁻
- B. NH₄⁺
- C. H₃O⁺
- D. OH⁻
2. What is the pH of 0.0050 mol dm⁻³ hydrochloric acid?
- A. 2.30
- B. 3.30
- C. 2.00
- D. 0.0050
3. A solution has pH 4.00. What is [H⁺]?
- A. 4.0 × 10⁻¹⁰ mol dm⁻³
- B. 4.0 mol dm⁻³
- C. 1.0 × 10⁻⁴ mol dm⁻³
- D. 1.0 × 10⁻¹⁰ mol dm⁻³
4. In HCO₃⁻ + H₂O ⇌ H₂CO₃ + OH⁻, which species acts as the Brønsted–Lowry acid in the forward reaction?
- A. H₂O
- B. HCO₃⁻
- C. H₂CO₃
- D. OH⁻
5. Which statement best explains why 0.1 mol dm⁻³ ethanoic acid has a higher pH than 0.1 mol dm⁻³ nitric acid?
- A. Ethanoic acid is more dilute
- B. Nitric acid is a weak acid
- C. Ethanoic acid contains no hydrogen ions
- D. Ethanoic acid is only partially dissociated