Tests For Anions Chemistry C3

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Testing for carbonates-check for carbon dioxide

Test for carbon dioxide:

1) bubble gas through limewater, if it is carbon dioxide it goes milky

2) you can use this to test for carbonates since carbonates react with dilute acid to form carbon dioxide

Acid + Carbonate --> Salt + Water + Carbon dioxide

Some carbonates change colour when they decompose

1) Put a spatula of carbonate into a test tube, heat strongly, allow to cool

2) Copper carbonate turns from green


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