Common gases and ions test and reults

The required reactions for AQA chemistry

No colour (flame)

No colour (flame)

Many possible ions (flame)

Yellow (flame)

Na+ (flame)

Crimson (flame)

Li+ (flame)

Orange-red (flame)

Ca²+ (flame)

Green (flame)

Cu²+ (flame)

Lilac (flame)

K+ (flame)

Blue precipitate

Cu²+

Green precipitate

Fe²+

Brown precipitate

Fe³+

No ammonia

No ions detected

White precipitate dissolves with more NaOH added

Al³+

White precipitate doesn't dissolve with more NaOH added

Ca²+ or Mg²+

Dilute acid fizzes (forming CO2) and turns limewater cloudy

CO3²-

Dilute acid doesn't fizz and BaCl2(aq) makes a white precipitate

SO4²-

AgNO3(aq) + dilute HNO3 makes a white precipitate

Cl-

AgNO3(aq) and dilute HNO3 makes a cream precipitate

Br-

Add AgNO3 and dilute HNO3 makes a yellow precipitate

I-

Burning splint at the end of a test tube, hydrogen rapidly burns making a pop noise

H+

Glowing splint into a test tube, oxygen makes it relight

O²-

Bubbles through limewater, limewater turns cloudy

CO2

Damp litmus paper put into it, litmus paper bleaches and turns white

Cl-