Tests for substances

Question 1

Test for Presence of Water

Answer 1

Can be tested with anhydrous copper sulfate, positive when it turns blue and maybe some steam is present

Question 2

Test for Purity of Water

Answer 2

Measure the boiling point or the melting point of the liquid with a thermometer. The boiling point has to be 100C and the melting point has to be 0C

Question 3

Test for Carbon Dioxide

Answer 3

Can be tested with limewater, positive when lime water goes milky

Question 4

Test for Hydrogen

Answer 4

Can be tested with a lit splint and when the splint comes into contact with hydrogen, a squeaky pop sound is produced

Question 5

Test for Oxygen

Answer 5

Can be tested with a glowing splint. positive, when it relights when in contact with oxygen

Question 6

Test for Ammonia Gas

Answer 6

Tested with damp red litmus paper, positive when it turns blue

Question 7

Test for Chlorine Gas

Answer 7

Tested with damp blue litmus paper, positive when it turns red and bleaches white