SALTS

The chemical industry makes hundreds of thousands of tons of different salts. Many methods for making salt starts with acids. Salts made from carbonic acid are called _____.

• chlorides

• sulfates

• nitrates

• carbonates

Salts can be prepared by reacting metals with acids. However, some metals will not react with acids to make salts. Which of the following metals will NOT react with acids?

• zinc

• iron

• magnesium

• copper

Look at the following word equation!

nitric acid + magnesium carbonate = _______ + _______ + _______

What is the missing product in the reaction between nitric acid and magnesium carbonate?

• magnesium nitrate + water

• magnesium oxide + water

• magnesium oxide + water + hydrogen

• magnesium nitrate + water + carbon dioxide

What happens when an acid reacts with metal oxide?

• salt and water are formed

• metal hydride is formed

• oxyacid will be formed

• salt and hydrogen gas are formed

Following word equations are given:

potassium hydroxide + nitric acid=potassium nitrate + water

sodium oxide + water = sodium hydroxide

Which are base and alkali from the reaction above, respectively?

• sodium hydroxide; sodium oxide

• sodium oxide; potassium hydroxide

• potassium hydroxide; sodium oxide

• potassium nitrate; sodium hydroxide

Look at the following procedure steps!

1. add zinc metal into beaker

2. remove from heat and leave for a few days

3. pour sulfuric acid into beaker

4. Pour the mixture into evaporating dish and heat gently

Budi wants to make a salt using zinc metal and sulfuric acid. Which is the correct order of the procedure steps?

• 1 - 4 - 3 - 2

• 4 - 3 - 2 - 1

• 3 - 1 - 4 - 2

• 3 - 4 - 1 – 2

Which gives the correct formula of example of salt that formed from hydrochloric acid?

• MgCl₂

• CuSO₄

• CaCO₃

• KNO₃

Alkalis react with acids and neutralize them. Which of the following is the correct word equation representing neutralization reaction?

• sodium hydroxide + hydrochloric acid = sodium chloride + water

• sodium oxide + water = sodium hydroxide

• copper carbonate + nitric acid = copper nitrate + water + carbon dioxide

• ammonia + hydrochloric acid = ammonium chloride

Which one of the following salts is used to help crops grow well?

• magnesium carbonate

• copper sulfate

• ammonium nitrate

• calcium sulfate

When solid X is added to dilute sulfuric acid, an aqueous solution of a sulfate salt is produced. What could solid X be?

• Copper

• Magnesium hydroxide

• Silver

• Zinc chloride