topic 21-analysis

• hydrogen is a lit splint produces a squeaky pop
• oxygen is a glowing splint relights
• carbon dixoide is bubble through limewater which turns milky/cloudy
• ammonia is damp red litmus paper turns blue
• chlorine is damp litmus paper bleaches
• water is anhydrous copper 2 sulfate turns from white to blue
• lithium produces a red flame
• sodium produces a yellow flame
• potassium produces a lilac flame
• calcium produces an orange-red (brick red) flame
• copper 2 produces a blue green flame
• copper 2 add sodium hydroxide solution- forms a blue precipitate
• iron 2 add sodium hydroxide- forms green precipitate
• iron 3 add sodium hydroxide- forms brown precipitate
• ammonium add sodium hydroxide and heat gently- forms ammonia gas damp red litmus paper should turn blue for presence
• chloride add nitric acid and silver nitrate- form white precipitate
• bromide add nitric acid and silver nitrate- form cream precipitate
• iodine add nitric acid and add silver nitrate- forms yellow precipitate
• sulphate add nitric acid and add barium chloride- white precipitate
• carbonate add nitric acid- test gas given off bubble through limewater turns milky/ cloudy co2 presence
• how to do a flame test, blue bunsen burner flame, clean nichrome wire, place sample on nichrome wire, place sample at Side of flame, note down the colour of flame