Test for anions

[Dooouuu]

hey guys ...
plz what is the test to detect Br anion ?....thnx 4 advance

 

[Adahshan]

Br, Add silver nitrate or lead nitrate..

With silver nitrate it's creamy ppt but with lead nitrate it's white ppt.

 

[burndtjamb]

It's not required for IGCSE, you only need to know Iodide and Chloride tests for the Halides.

 

[Dooouuu]

thanks ... what about the test of the SO2 gas ?

 

[SexyFag]

Carbonates - Add Dilute Acid, Limewater - Effervescence, carbon Dioxide Gas Produces, Turns Limewater Milky
Chloride - Acidify With Dilute Nitric Acid, Then add Aqueous Silver Nitrate - White Precipitate
Iodine - Same As Chloride - Yellow Precipitate
Nitrates - Add Aqueous Sodium Hydroxide, then aluminium foil, warm carefully - Ammonia, Pungent Smelling Gas Given Off, Turns damp red Litmus paper Blue
Sulphate - Acidify With Dilute NItric Acid, then aqueous Barium Nitrate - White Percipitate

 

[haochen]

thanks ... what about the test of the SO2 gas ?

pass through potassium dichromate it will change from orange to green

hope it helpED