Preparation EASE 3 Grade 8

The chemical industry makes hundreds of thousands of tonnes of different salts. Many methods for making salt start 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

Which gas is formed when magnesium reacts with hydrochloric acid?

• magnesium chloride

• hydrogen

• oxygen

• 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

Look at the following equation!

sulfuric acid + X --> Y + water

H2SO4(aq) + CuO(s) --> CuSO4(aq) + H2O(aq)

What are X and Y compounds, respectively?

• cobalt oxide and cobalt sulfite

• cobalt oxide and cobalt sulfate

• copper oxide and copper sulfite

• copper oxide and copper sulfate

Which acid is needed to make sodium chloride from sodium hydroxide?

• hydrochloric acid

• phosphoric acid

• nitric acid

• sulfuric acid

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 the beaker

2. remove from heat and leave for a few days

3. pour sulfuric acid into the 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 the example of salt that formed from hydrochloric acid?

• MgCl2

• CuSO4

• CaCO3

• KNO3