Gas Tests

Question 1

How can you create hydrogen as a product and test for hydrogen?

Answer 1

By creating a salt, use a lit splint, if it is hydrogen gas thrn it will burn with a squeaky pop

Question 2

What does hydrogen burn with to make water?

Answer 2

Oxygen in the air

Question 3

How can you get oxygen as a product and how can you test for it?

Answer 3

Decomposition of hydrogen peroxide H2O2 = 2H2O + O2, glowing splint relights

Question 4

How can you form carbon dioxide and how do you test for it and why does it turn milky?

Answer 4

Marble chips and acid (2CaCO3 + HCl = CaCl2 + H2O + CO2), two test tubes connected with a delivery tube, as reaction happens in one, carbon dioxide goes in the delivery tube into the other causing lime water to go milky, white or cloudy, calcium hydroxides (lime water) reacts with carbon dioxide to form calcium carbonate (insoluble) and water

Question 5

How can you get chlorine as a product and how can you test for it?

Answer 5

Electrolysis of sodium chloride solution, damp blue litmus paper is put in test tube with chlorine gas, initially it turns red because chlorine is an acidic gas, but after a few seconds it turns white (bleached)

Chlorine gas bleaches damp blue litmus paper