GCSE Chemistry 11L1: 1.2 Limestone
These flashcards cover key facts about calcium carbonate, including its chemical properties, thermal decomposition, and its role in construction materials like cement and mortar. They also explain how lime water reacts with carbon dioxide.
Is calcium carbonate a compound or mixture?
It is a compound
Key Terms
Is calcium carbonate a compound or mixture?
It is a compound
What is the chemical formula for calcium carbonate?
CaCO3
What does calcium carbonate break down into through thermal decomposition?
Calcium oxide and carbon dioxide
What is used to make cement?
Clay and powder limestone
What is used to make mortar?
Cement, sand and water
What happens to lime water when carbon dioxide is present?
It turns cloudy
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| Term | Definition |
|---|---|
Is calcium carbonate a compound or mixture? | It is a compound |
What is the chemical formula for calcium carbonate? | CaCO3 |
What does calcium carbonate break down into through thermal decomposition? | Calcium oxide and carbon dioxide |
What is used to make cement? | Clay and powder limestone |
What is used to make mortar? | Cement, sand and water |
What happens to lime water when carbon dioxide is present? | It turns cloudy |
Calcium oxide reacts with water to produce what? | Calcium hydroxide |
Calcium carbonate breaks down when heated what is this called called? | Thermal decomposition |
What colour is calcium oxide when hot? | Yellow |
What colour is calcium oxide when cold? | White |
How do you produce calcium oxide from calcium carbonate? | Heating it |
What is the formula for calcium oxide plus water. | CaO+H2O->Ca(OH)2 |
What is a benefit of a lime stone quarry? | Local employment |
Limestone is mostly made of what? | Calcium carbonate |
An advantage of using concrete for building foundations. | It is strong when squashed. |
Limestone is mostly made of what? | Calcium Carbonate |
What is mixed with Limestone and Sodium carbonate to create glass? | Sand |
What type of rock is Limestone? | Sedimentary |
How does limewater convert into limestone? | Carbon dioxide is bubbled through it |
What compound dissolves in water to form lime water? | Calcium hydroxide |
Cement is powdered limestone and what? | Sand and water |
If carbon dioxide is present, what does the lime water do? | Goes cloudy ☁️☁️☁️ |
What does limestone under go when heated? | Thermal Decomposition |
When limestone reacts with an acid what is produced? | Water, Carbon Dioxide & a salt |
What gas is added to limewater to make limestone? | Carbon Dioxide |
What is the chemical symbol for lime water? | Ca(OH) (Aq) | 2 |
What is an economic impact of quarrying for Limestone? | New jobs and more money |
Andy says "Acid rain doesn't damage limestone". Is andy correct or wrong | Andy is wrong |
Cement is used to make concrete, but what else is? | sand, water & powdered rock aggregate |
When Limestone is heated you get a new substance and a gas, write out the chemical symbols for both of these. | CaO + CO | 2 |
What is produced by putting limestone under thermal decomposition | Calcium oxide and carbon dioxide |
If limewater turn cloudy what is present? | Carbon dioxide |
What is needed in order to created cement? | Clay and limestone which is powdered |
Carbonates react with icid to produce what? | Carbon dioxide |