11.3 Making salts – acids and alkalis

What is the importance of sodium chloride?

• Help dye clothes

• Preserve and flavour food

• All of the above

• Make chlorine and sodium hydroxide

Sodium chloride is so important as it is used to:

• Preserve and flavour food.

• Help dye clothes.

• Make other important chemicals, such as chlorine and sodium hydroxide.

• Making sulfuric acid.

• Petroleum industry.

Which of these we can use for making sodium chloride you can:

1. Extract it from the sea.

2. Mine the rock salt.

3. In the laboratory.

• 1 only.

• 1 and 3 only.

• 1, 2 and 3.

• 3 only.

• 2 only.

Burning sodium in chlorine reaction is hazardous.

• True.

• False.

The sodium chloride produced from burning sodium in chlorine is pure.

• True.

• False.

.............................+ ............................ -----------------> Sodium chloride

Complete the reaction by picking suitable reactants.

• Sodium / Chlorine

• Sodium / Chloride

• Sodium Hydroxide / Chlorine

• Hydrochloric acid / Sodium hydroxide

• Hydrochloric acid / Sodium carbonate

Potassium hydroxide+ Nitric acid -----------------> ........................................ + ....................................

Complete the reaction by picking suitable products.

• Potassium / Water

• Sodium nitrate / Water

• Potassium nitrate / Water

• Potassium acid / Hydroxide

• Potassium nitric / Water

How can sodium chloride be made in the laboratory?

• None of the above

• Both A and B

• Neutralising an acid with an alkali

• Burning sodium in chlorine

What happens when dilute hydrochloric acid reacts to neutralise sodium carbonate?

• Both reactants are soluble in water

• It creates a green solution

• It produces a visible reaction

• It turns red

What is the purpose of adding charcoal powder in the process of making sodium chloride salt?

• To neutralise the solution

• To increase the purity

• To remove the colour

• To speed up the reaction