Testing for gases 4.8.2.1-4

Question 1

What must you assume when handling and unknown gas and how to prevent potential harm?

Answer 1

• you must assume its toxic

- keeping the gas in a fume cupboard to prevent you from breathing in toxic fumes

Question 2

How do you test for Carbon dioxide?

Answer 2

bubble gas through limewater - if it’s carbon dioxide the limewater will turn cloudy

Question 3

How do you test for Hydrogen?

Answer 3

Place a lit splint in the gas - if the gas is hydrogen it will make a squeaky pop noise.

Question 4

How do you test for Oxygen?

Answer 4

Place a glowing splint in gas, if it’s oxygen the splint will relight.

Question 5

How do you test for Chlorine?

Answer 5

damp (blue) litmus/universal indicator paper - if it’s chlorine it will turns red then white.