DETECTING GASES

How to test for carbon dioxide gas?

Pass carbon dioxide to lime water. Shake the carbon dioxide / Put limewater into the test tube. Blow into it with the straw (really lightly and covering the top)

What observations would you get for carbon dioxide test?

Limewater turns cloudy / milky

How would you tests for hydrogen gas?

Light a splint, then put into the gas

What observation would you get from hydrogen test?

The lighted splint burns with a ‘pop’ sound

How would you test from chlorine gas?

IN A FUME CUPBOARD - Take the blue litmus paper and put it into chlorine gas

What observation would you make for chlorine gas?

Moist blue litmus paper turns colourless

How would you test for oxygen gas?

Put a glowing splint in the test tube

What observations would you make for oxygen gas?

Squeaky pop