Y7 Limestone cycle reactions

What is the chemical formula of calcium carbonate

• Ca₂CO₃
• Ca(CO)₃
• CaCO₃
• CaCO

How is calcium oxide formed?

• thermal decomposition of calcium carbonate
• Displacement of calcium carbonate
• combustion of calcium carbonate
• reaction of calcium and water

What are the products of thermal decomposition of calcium carbonate

• calcium oxide only
• calcium hydroxide and water
• calcium oxide and carbon dioxide
• Calcium hydroxide only

How is calcium hydroxide solution produced?

• Calcium carbonate and water
• Calcium oxide and water
• Calcium carbonate and acid
• calcium oxide and acid

What do we use limewater to test for?

• Hydrogen
• Oxygen
• Carbon Dioxide
• Chlorine

What is the correct chemical name for the substance more commonly known as ‘quicklime’?

What is the formula of calcium hydroxide?

• Ca(OH)₂

• Ca(OH)₃

• CaOH
• Ca₂OH

What is the chemical name of the compound CaO

• Calcium Oxide
• Carbon Monoxide
• Calcium Chloride
• Copper Oxide

Label the limestone cycle

d

e

f

g

c

b

a

Add heat

add carbon dioxide

calcium hydroxide solution

calcium hydroxide

add water

Calcium oxide

add more water

Match the following chemical names to their chemical formula

• CaCO₃

• carbon dioxide

• CaO

• water

• CO₂

• calcium hydroxide

• Ca(OH)₂

• Calcium Carbonate

• H₂O

• calcium oxide