Diffusion experiments

Question 0

What is diffusion?

Answer 0

Diffusion is the net movement of particles from a high concentration to a Lower concentration

Question 1

What colour is potassium manganate?

Answer 1

Purple

Question 2

What is an experiment you could do to experiment diffusion with potassium manganate (VII)?

Answer 2

1) put some water in a beaker
2) put some potassium manganate in the beaker
3) leave for a while and the purple colour will diffuse out into the water

Question 3

If you add more water to the potassium manganate experiment will the solution be more or less dilute?

Answer 3

More dilute

Question 4

What is the symbol for ammonium ?

Answer 4

NH3

Question 5

What is HCl?

Answer 5

Hydrochloric acid

Question 6

What gas does hydrogen chloride give off?

Answer 6

Chlorine gas

Question 7

In the diffusion experiment there is a glass tube with Colton wool soaked in aqueous ammonia at one end and cotton wool soaked in hydrochloric acid at the other end. What is the white ring formed ?

Answer 7

Ammonium chloride

Question 8

Which end does the white ring form nearer to in the ammonia and hydrogen chloride diffusion experiment?

Answer 8

Forms nearer hydrochloric acid (away from ammonia ) ( ammonia particles are lighter )

Question 9

What colour is bromine gas?

Answer 9

Brown

Question 10

Describe an experiment using bromine gas to show diffusion

Answer 10

1) fill half a glass jar of bromine gas
2) separate the air and bromine gas with a glass block
3) remove glass plate
4) bromine gas diffuses into air due to random movement of gas particles so the air becomes brown