Chemistry Tests

• Ammonia -> damp red litmus paper turns blue
• Carbon Dioxide -> bubble through limewater -> turns milky
• Chlorine -> damp blue litmus paper is bleached
• Hydrogen -> introduce lit splint -> squeaky pop
• Oxygen -> introduce a glowing splint -> it relights
• Li+ -> red flame
• Na -> yellow flame
• K -> lilac flame
• Ca -> orange/red flame
• Cu -> blue/green flame
• Copper (II) light blue precipitate formed
• Iron (II) -> green precipitate formed
• Iron (III) -> red brown precipitate formed
• Carbonate -> add dilute acid and test the gas produced, if carbon dioxide is produced, the carbonate is present.
• Chloride -> acidify with dilute nitric acid and add aqueous silver nitrate -> white precipitate
• Bromide -> acidify with dilute nitric acid and add aqueous silver nitrate -> cream precipitate
• Iodine -> acidify with dilute nitric acid and add aqueous silver nitrate -> yellow precipitate
• Sulfate -> acidify with dilute nitric acid and add barium nitrate -> white precipitate
• Water -> add anhydrous copper sulfate -> white to blue colour change