Lesson 5.4.2.5
5.4.2.5 Strong and weak acids (HT only) Quiz: AQA Combined Science, Unit 11
20 questions
In partnership with Revision Ninja
Lesson 5.4.2.5, Strong and weak acids (HT only): 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 11: Chemical changes, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
What defines a strong acid in aqueous solution?
- Completely ionised
- High concentration
- Partially ionised
- Low pH only
-
What defines a weak acid in aqueous solution?
- High pH only
- Completely ionised
- Low concentration
- Partially ionised
-
Which of these is a strong acid?
- Nitric acid
- Carbonic acid
- Citric acid
- Ethanoic acid
-
Which of these is a weak acid?
- Sulfuric acid
- Ethanoic acid
- Nitric acid
- Hydrochloric acid
-
For acids of equal concentration, how does a stronger acid affect the pH?
- Lower pH
- Higher pH
- Neutral pH
- Unchanged pH
-
When the pH decreases by one unit, what is the change in hydrogen ion concentration?
- Decreases twofold
- Increases twofold
- Decreases tenfold
- Increases tenfold
-
One solution has 1000 times the hydrogen ion concentration of another. How far apart are their pH values?
- 1 unit
- 100 units
- 10 units
- 3 units
-
What does the term dilute mean for an acid in terms of amount of substance?
- Completely ionised
- Partially ionised
- Low amount dissolved
- High amount dissolved
-
What does the term weak mean when describing an acid?
- Partially ionised
- Low concentration
- High concentration
- Completely ionised
-
Which combination of strength and concentration is possible for an acid?
- Concentrated non-acid
- Weak strong acid
- Strong undissolved acid
- Concentrated weak acid
-
Which description fits carbonic acid?
- A neutral solution
- A strong acid
- A weak acid
- A strong alkali
-
At equal concentration, which aqueous acid has the higher pH?
- Sulfuric acid
- Nitric acid
- Hydrochloric acid
- Ethanoic acid
-
How many times greater is the hydrogen ion concentration at pH 2 than at pH 4?
- 2 times
- 1000 times
- 100 times
- 10 times
-
How many times greater is the hydrogen ion concentration at pH 1 than at pH 6?
- 10 times
- 6 times
- 100 000 times
- 1000 times
-
What is the pH of a 0.01 mol/dm3 solution of a strong acid, such as hydrochloric acid, which is fully ionised?
- pH 2
- pH 7
- pH 0.01
- pH 1
-
A 0.1 mol/dm3 solution of hydrochloric acid has pH 1. What is the pH of a 0.001 mol/dm3 solution?
- pH 4
- pH 3
- pH 2
- pH 0.001
-
At the same concentration, which acid reacts faster with magnesium metal?
- Pure water
- Strong acid
- Weak acid
- Neutral solution
-
Which equation shows a weak acid ionising only partly?
- CH3COOH <=> H+ + CH3COO-
- HNO3 -> H+ + NO3-
- CH3COOH -> H+ + CH3COO-
- HCl -> H+ + Cl-
-
A 0.1 mol/dm3 solution of hydrochloric acid is fully ionised. What is the hydrogen ion concentration?
- 10 mol/dm3
- 0.01 mol/dm3
- 0.1 mol/dm3
- 1 mol/dm3
-
What happens to the pH of an acid solution when it is diluted with water?
- Falls towards 0
- Drops to zero
- Rises towards 7
- Remains constant
Related quizzes
- Eukaryotes and prokaryotes Quiz · 4.1.1.1 · 20 questions
- Principles of organisation Quiz · 4.2.1 · 20 questions
- Communicable (infectious) diseases Quiz · 4.3.1.1 · 20 questions
- Photosynthetic reaction Quiz · 4.4.1.1 · 20 questions
- Homeostasis Quiz · 4.5.1 · 20 questions
- Sexual and asexual reproduction Quiz · 4.6.1.1 · 20 questions
- Communities Quiz · 4.7.1.1 · 20 questions
- Atoms, elements and compounds Quiz · 5.1.1.1 · 20 questions
- Animal and plant cells Quiz · 4.1.1.2 · 20 questions
- The human digestive system Quiz · 4.2.2.1 · 20 questions