F3. ELECTROLYSIS

Question 1

Ionic compounds conduct electricity when ____ or ____.

the ionic compound is called an?

Answer 1

molten or aqueous

electrolyte

Question 2

• decomposition of a substance by electricity is called…
• chemical decomposition produced by passing an electric current through a liquid or solution containing ions.

Answer 2

electrolysis

Question 3

• an ionic compound in the molten or aqueous state
• conducts electricity
• decomposed by the current

Answer 3

electrolyte

Question 4

• rods through which the direct current enters and leaves the cell
• usually inert

Answer 4

electrodes

Question 5

• electrode connected to the positive terminal of the cell.
• anions are attracted to it.
• oxidation occurs

Answer 5

anode

Question 6

• connected to the negative terminal of the cell.
• cations are attracted to it.
• reduction occurs.

Answer 6

cathode

Question 7

molten electrolyte is electrolysed

1. METALS (from positive ions) are discharged at the ____.
2. NON-METALS (from negative ions) are discharged at ____.

Answer 7

1. CATHODE
2. ANODE

Question 8

aqueous electrolyte is electrolysed

1. the product at the cathode is a ____ or ____.
2. the product at the anode is a ____.

products come from either the ____ or ____.

Answer 8

1. METAL or HYDROGEN GAS.
2. NON-METAL

electrolyte or water present

Question 9

____ are not discharged at the cathode.
Instead, ____ from water is ____.

Answer 9

1. REACTIVE METALS
2. HYDROGEN
3. EVOLVED

Question 10

____ and ____ ions are not discharged at the
anode. Instead, ____ from water is ____.

Answer 10

1. SULPHATE
2. NITRATE
3. OXYGEN
4. PRODUCED