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Chemistry Unit 1- Products from Rocks…read more

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Limestone is mainly calcium
carbonate, CaCO3
When it is heated it is thermally decomposed to make
calcium oxide (quicklime) and carbon dioxide, CaCO3
CaO + CO2. when other carbonates are heated up they
also decompose in the same way. E.g. magnesium
carbonate to make magnesium oxide and carbon dioxide,
MgO3 MgO + CO2. Thermal decomposition is when one
substance is chemically changed to at least two new
substances when it is heated.…read more

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Quicklime into slaked lime- just
add water
When you add water into quick lime it produces slaked
lime. Slaked lime is actually calcium hydroxide. Quicklime
and water makes slaked lime, CaO + H2O Ca(HO)2.
Slaked lime is an alkali which can be used to neutralise
acid soil in fields. Powered limestone can be used to do
this, but slaked lime is much more faster. Slaked lime can
be added to mortar.…read more

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Limestone is used to make other
useful things too
Powered limestone is heated up in kilns with powered clay
to make cement. The cement is mixed with sand and water
to make mortar. Mortar is used to put bricks together with
and it is used to cover outside walls. Or you can mix it with
sand, water and gravel to make concrete. Limestone can
also make glass, you just heat it up and mix it with sand
and sodium carbonate until it melts. Cement, concrete and
glass are used as building materials.…read more

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