Qualitative Analysis

Question 1

Test for Carbon Dioxide ( CO^2)

Answer 1

Test
Bubble the gas into limewater
Observation
Effervescence of colourless and odorless gas
A white precipitate is formed in limewater

Question 2

Test for Hydrogen

Answer 2

Test
Place a lighted splint on the mouth of the test tube
Observation
A effervescence of colourless and odorless gas
The gas extinguishes the flame on the lighted splint with a ‘pop’ sound

Question 3

Test for Oxygen

Answer 3

Test
Place a glowing splint at the mouth of the test tube
Observation
Effervescence of colourless and odoerless gas
The gas relights the glowing splint