chem igcse test for anions

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7 Terms

1
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carbonate, CO3^2−

add dilute acid, then test for carbon dioxide gas, effervescence, carbon dioxide produced

2
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chloride, Cl^- (in solution)

acidify with dilute nitric acid, then add aqueous silver nitrate, white precipitate 

3
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bromide, Br^- (in solution)

acidify with dilute nitric acid, then add aqueous silver nitrate, cream precipitate 

4
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iodide, I^- (in solution)

acidify with dilute nitric acid, then add aqueous silver nitrate, yellow precipitate 

5
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nitrate, NO3^- (in solution)

add aqueous sodium hydroxide, then aluminium foil; warm carefully, ammonia produced

6
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sulfate, SO4^2- (in solution)

acidify with dilute nitric acid, then add aqueous barium nitrate, white precipitate 

7
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sulfite, SO3 ^2-

add a small volume of acidified aqueous potassium manganate(VII), the acidified aqueous potassium manganate(VII) changes colour from purple to colourless