Characteristic Properties of Acids and Bases Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Which of the following correctly describes the difference between a base and an alkali?
- A. A base is any substance that reacts with an acid, whilst an alkali is a soluble base
- B. An alkali is any substance that reacts with an acid, whilst a base is a soluble alkali
- C. Bases contain OH⁻ ions, whilst alkalis contain H⁺ ions
- D. Alkalis are always oxides or hydroxides of metals, whilst bases are always soluble
2. What is the colour change when universal indicator paper is used to test a solution with pH 3?
- A. Blue to purple, indicating strong alkalinity
- B. Red to orange, indicating acidity
- C. Orange to yellow, indicating weak acidity
- D. Green, indicating neutrality
3. When hydrochloric acid reacts with calcium carbonate, what type of reaction occurs and what is a typical observation?
- A. A displacement reaction producing bubbles of hydrogen gas
- B. An acid-base reaction producing an insoluble salt
- C. An acid-carbonate reaction producing carbon dioxide gas which causes effervescence
- D. A redox reaction producing water and a metal chloride
4. Ethanoic acid is classified as a weak acid. Which equation correctly represents its dissociation in aqueous solution?
- A. CH₃COOH(aq) → CH₃COO⁻(aq) + H⁺(aq)
- B. CH₃COOH(aq) ⇌ CH₃COO⁻(aq) + H⁺(aq)
- C. CH₃COOH(aq) + H₂O(l) → CH₃COONa(aq) + H₂(g)
- D. CH₃COOH(aq) → CH₃CO(aq) + H⁺(aq) + OH⁻(aq)
5. A solution of an unknown substance has pH 10 when tested with universal indicator. Which statement must be true about this solution?
- A. It contains H⁺ ions and is more acidic than a solution with pH 7
- B. It contains OH⁻ ions and acts as an alkali; it would turn red litmus paper blue
- C. It is neutral and contains equal concentrations of H⁺ and OH⁻ ions
- D. It is a weak base that would not react with acids