Required Practical 9

Question 1

What are the two aqueous solutions?

Answer 1

Copper 2 chloride (Cu^2Cl)
Sodium chloride (NaCl)

Question 2

Method

Answer 2

1. pour 50cm3 of copper 2 chlorine solution into a beaker
2. place a petri-dish with 2 holes over the beaker
3. insert carbon rods with crocodile clips in each hole
4. connects electrodes to a power pack on 4 volts
5. cathode should have chlorine bubbles
6. anode should have copper forming on it
7. repeat experiment with sodium chloride
8. chlorine bubbles should form at the anode
9. hydrogen bubbles should form at the cathode

Question 3

What equipment acts as the electrodes

Answer 3

Graphite rods

Question 4

What are the names and charges of the electrodes

Answer 4

Anode (-)

Cathode (+)

Question 5

How do you test for chlorine on the electrodes?

Answer 5

Hold blue litmus paper nearby and if it bleaches, there is chlorine

Question 6

How do you test for hydrogen?

Answer 6

Squeaky pop test

hold hydrogen to a lit splint