1.2 Limestone
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What do metals high up in the reactivity series need a lot of to decompose carbonates ?
Energy
What is the equation for the thermal decomposition of calcium carbonate?
Heat Calcium Carbonate —–> Calcium Oxide + Carbon Dioxide
Limestone is a type of what ?
Rock
Limestone is composed of what ?
Calcium carbonate
Limestone is used in the manufacture of what ?
Cement and concrete
What is quarrying?
Quarrying means digging things out of the ground
What is an advantage of quarrying ?
Limestone is a valuable natural resource and is used to make things such as glass and concrete. It creates jobs locally.
How fast do limestone , cement and mortar react with carbon dioxide when it is dissolved in rain water ?
Slowly
What is an disadvantage of quarrying ?
Quarrying is a heavy industry that causes noise pollution , dust pollution and visual pollution.
Which out of these 3 are easily formed into different shapes: 1) cement 2) mortar 3) concrete
3) concrete
What is the other name for quicklime ?
The other name for quicklime is calcium oxide
How is cement made?
Cement is made by heating powdered limestone with clay.
What is an advantage of using glass ?
Glass is transparent and so let’s light into buildings and is very effective.
What does limestone break down into ?
It breaks down to form calcium oxide and carbon dioxide
What are the disadvantages of glass ?
Glass breaks easily and is fragile , it also makes houses very hot in the summer
What does thermal decomposition mean?
The breaking down of a substance using heat.
How is calcium oxide turned into solid calcium hydroxide?
By adding small amounts of water.
Why does limewater (calcium hydroxide solution) turn cloudy when carbon dioxide is bubbled through it?
In soluble calcium carbonate is produced.