Electrolysis- C

Question 1

List the method for the electrolysis required practical

Answer 1

-Pour electrolyte solution into a beaker
-Insert two graphite electrodes
-Connect the electrodes to a DC power supply
-Switch on and observe changes at each electrode
-Test any gas produced (e.g., hydrogen with a lit splint)
-Record your observations for each electrode

Question 2

Independent variable?

Answer 2

Electrolyte solution used

Question 3

Dependent variable?

Answer 3

Substances produced at each electrode

Question 4

Control variable?

Answer 4

Voltage

Question 5

Possible error?

Answer 5

Electrodes might not be completely clean, affecting results

Question 6

One way to reduce errors

Answer 6

Keep voltage constant

Question 7

What should you do after the experiment

Answer 7

Record your observations of what forms at the anode and cathode and any tests you performed