C8 Tests for Gasses (practical) (pg 155)

Question 1

There are tests for 4 common Gasses.

(need to know for exam).

Chlorine bleaches damp litmus paper, what colour will it go?

Answer 1

it will turn white. (it may turn red for a moment first though - that because a solution of chlorine is acidic).

Question 2

If you put a glowing splint inside a test tube containing Oxygen, what will happen?

Answer 2

the oxygen will relight the glowing splint.

Question 3

Bubbling carbon dioxide through (or shaking carbon dioxide with) an aqueous solution of calcium hydroxide (known as limewater) causes what?

Answer 3

causes the solution to turn cloudy.

Question 4

If you hold a lit splint at the open end of a test tube containing hydrogen, what will happen?

Answer 4

you will get a squeaky pop (the noise comes from the hydrogen burning quickly with the oxygen in the air to form H2O)

Question 5

Hadia collects the gas given off during a reaction and bubbles it through limewater. The limewater goes cloudy. Identify the gas produced? (1 mark)

Answer 5

Carbon Dioxide (1 mark)