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Give an example of a use of Calcium Hydroxide.
-Calcium hydroxide is soluble in water and forms a solution, limewater, used to test for carbon dioxide.-Calcium oxide, calcium hydroxide and calcium carbonate can be used to neutralise soil acidity.-Calcium carbonate can be used to remove acidic gases from coal-fired power station chimneys reducing harmful emissions and acid rain.
Write the word equation of the reaction of the Limestone reaction cycle:
Calcium carbonate is heated and decomposes, forming calcium oxide (lime) and releasing carbon dioxide gas.Calcium carbonate ---> calcium oxide + carbon dioxide
When water is added to calcium oxide heat is generated, steam is released, and forms slaked lime (calcium hydroxide).Calcium oxide + water ---> calcium hydroxide
Calcium carbonate reacts with acids to release carbon dioxide gas.Calcium carbonate + hydrochloric acid ---> calcium chloride + carbon dioxide
Explain why farmers may choose to use calcium hydroxide in their fields.
To neutralise the acidity levels in the soil from which the farmers grow their crops.
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