Acids+Bases -Grade Gorilla IB Chemistry

Target: 10 Questions in 10 minutes An IB Chemistry data booklet is helpful
1. Which two species are the Brønsted-Lowry bases in the ionization of methylamine in water, as shown below? CH₃NH₂ + H₂O ⇌ CH₃NH₃⁺ + OH^- A. CH₃NH₂ and OH^- B. CH₃NH₃⁺ and OH^- C. CH₃NH₂ and H₂O D. H₂O and CH₃NH₃⁺		ABCD
2. What is the conjugate base of HCO₃^- ? A. CO₂ B. CO₃^- C. CO₃^2- D. H₂CO₃		ABCD
3. Consider the following reaction in a phosphate buffer: H₂PO₄^- + H₂O ⇌ HPO₄^2- + H₃O⁺ Which of the following statements is correct?
A. H₂PO₄^- is a conjugate acid of HPO₄^2- . B. H₃O⁺ is a conjugate base of H₂O. C. H₂PO₄^- and H₂O are a conjugate acid-base pair. D. Water acts as a Brønsted-Lowry acid in the forward reaction.		ABCD
4. Which two species in the following equation act as Brønsted-Lowry acids? H₂SO₄ + HNO₃⇌ HSO₄^- + H₂NO₃⁺
A. H₂SO₄ and HNO₃ B. HNO₃ and H₂NO₃⁺ C. H₂SO₄ and HSO₄^- D. H₂SO₄ and H₂NO₃⁺		ABCD
5. Which of the following word equations are correct for forming potassium chloride salt? I. potassium + hydrochloric acid → potassium chloride + oxygen II. potassium hydroxide + hydrochloric acid → potassium chloride + water III. potassium hydrogencarbonate + hydrochloric acid → potassium chloride + carbon dioxide + water
A. I and II only B. I and III only C. II and III only D. I, II and III		ABCD
6. Which of the following word equations is correct for making ammonium nitrate salt?	flickr
A. ammonia + nitric acid → ammonium nitrate B. ammonia + nitric acid → ammonium nitrate + water C. ammonium hydroxide + nitric acid → ammonium nitrate + hydrogen + water D. ammonium hydroxide + sodium nitrate → ammonium nitrate + sodium hydroxide		ABCD
7. Which of the following statements about acids is true? A. All metals can react with acids to form salt and hydrogen. B. Acids are substances which all contain oxygen. C. Acids always have a pH of more than 7 in aqueous solutions. D. An acid reacts with a base to form salt and water.		ABCD
8. Which combination of compounds below can react to form sodium sulphate(VI) salt? A. Na and H₂S B. Na and SO₂ C. NaOH and H₂SO₄ D. NaHCO₃ and H₂SO₃		ABCD
9. Which of the following species cannot function as both a Brønsted-Lowry acid and a Brønsted-Lowry base? A. H₂O B. HCO₃^- C. HSO₃^- D. SO₄^2-		ABCD
10. In the dissociation of carbonic acid in water, as shown by the equations below, which species can both donate and receive a proton? H₂CO₃ + H₂O ⇌ HCO₃^- + H₃O⁺ HCO₃^- + H₂O ⇌ CO₃^2- + H₃O⁺
A. H₂O B. CO₃^2- C. HCO₃^- D. H₂CO₃		ABCD