atmosphere

Question 1

test for oxygen: state one reason that might account for the value of oxygen being lower than expected

Answer 1

• if the metal wasn’t heated enough or for long enough for all the oxygen to react
• equipment might’ve had a leak in it, allowing more air (and oxygen) to enter it

Question 2

sulfur + oxygen —> ?

Answer 2

sulphur dioxide

Question 3

test for oxygen gas?

Answer 3

put a glowing splint into the gas, if it relights it’s oxygen

Question 4

sample of oxide dissolved in water, UI added & it turns blue. what does this tell you about the identity of the oxide?

Answer 4

must be a metal oxide since it’s formed an alkaline solution when dissolved in water

Question 5

sample of oxide dissolved in water, UI added & it turns red. what does this tell you about the identity of the oxide?

Answer 5

must be a non-metal oxide because it’s formed an acidic solution when dissolved into water