Chapter C6 - Electrolysis

Question 1

Define electrolysis (2)

Answer 1

• The process by which ionic substances are decomposed (broken down) into simpler substances
• when an electric current is passed through them

Question 2

Define electrolyte (1)

Answer 2

• The compound broken down by electrolysis

Question 3

Is the anode positive or negative (1)

Answer 3

Positive

Question 4

Is the cathode positive or negative (1)

Answer 4

• Negative

Question 5

What are electrodes made of and why (3)

Answer 5

• Often made up of an inert/unreactive substance
• Such as graphite or sometimes expensive platinum metal
• So the electrodes don’t react with the electrolyte or the products made in electrolysis

Question 6

Write a balanced symbol equation, including state symbols, for the electrolytic decomposition of molten sodium chloride