AngliaCampus : Activity: Questions and answers

Activity 5: Questions and answers

Questions:

1. Name the acid present in vinegar.
A. Citric acid	B. Lactic acid
C. Ethanoic acid	D. Hydrochloric acid

2. What is the formula for sulphuric acid?
A. H₂SO₄	B. HCl
C. HNO₃	D. H₂CO₃

3. Name the salt formed when sulphuric acid reacts with zinc metal.
A. Zinc oxide	B. Zinc carbonate
C. Zinc nitrate	D. Zinc sulphate

4. What is the test for hydrogen gas?
A. Turns blue litmus red	B. Turns limewater milky
C. Fizzes with carbonate	D. Burns with a squeaky pop

5. Which of the following is not the property of an acid?
A. Turns red litmus blue.	B. It is neutralised by a base
C. Fizzes with carbonate	D. It has a sour taste

6. Which one of the following is the strongest acid?
A. Concentrated citric acid	B. Dilute ethanoic acid
C. Dilute sulphuric acid	D. Dilute carbonic acid

7. Which one of the following solutions would have the lowest pH if they were all at the same concentration?
A. Nitric acid solution	B. Ethanoic acid solution
C. Carbonic acid solution	D. Copper sulphate solution

8. Name the reactants needed to make magnesium nitrate
A. Magnesium + hydrochloric acid	B. Magnesium oxide + nitric acid
C. Magnesium hydroxide + sulphuric acid	D. Magnesium carbonate + ethanoic acid

9. Which of the following reactions could be used to prepare carbon dioxide gas?
A. Calcium + hydrochloric acid	B. Calcium oxide + hydrochloric acid
C. Calcium carbonate + hydrochloric acid	D. Calcium hydroxide + hydrochloric acid

10. Use a word from the list to answer the following questions. Use each word only once.

citric acid

nitric acid

calcium carbonate

water

hydrochloric acid

carbonic acid

A. The name of the acid used to make sodium chloride.
B. The insoluble chemical formed when carbon dioxide is bubbled into limewater.
C. The chemical produced when hydrogen burns in air.
D. The name of the acid found in lemons.
E. A weak acid found in soda water.
F. The acid used to make nitrate salts.

11. Anti-acid tablets are designed to cure the build up of excess hydrochloric acid in the stomach. They usually contain insoluble carbonates. A student wanted to investigate the reaction between the insoluble carbonate and the dilute hydrochloric acid in the laboratory. The student decided to dissolve the soluble ingredients of the tablet in 100 cm3 of water and then to separate the insoluble carbonate from the soluble ingredients.

The insoluble carbonate obtained is a mixture of calcium carbonate and magnesium carbonate. When dilute hydrochloric acid is added to this mixture a gas is produced.

A. How could the student make sure that all the soluble ingredients dissolved in the water?

B. How could the student separate the insoluble carbonate from the solution of other ingredients?

C. Describe a simple chemical test that the student could carry out to prove that the gas produced when acid is added to the insoluble carbonates is carbon dioxide.

D. Name the salt produced when dilute hydrochloric acid reacts with the magnesium carbonate.

E. Write a word equation for the reaction between dilute hydrochloric acid and calcium carbonate.

12. Soda water is an aqueous solution of carbon dioxide. Some of the dissolved carbon dioxide reacts with the water to form a weak acid. The weak acid will react with limewater (calcium hydroxide solution) to form an insoluble salt.

A. Name and write the formula for the acid formed when carbon dioxide reacts with water.

Name:

Formula:

B. Name the salt formed when the acid reacts with limewater.

C. What is the name of the other product formed when the acid reacts with limewater?

D. Write a full word equation for the reaction between the acid and limewater.