C1 - C5 Chemistry

Question 1

Turn these ions to neutral atoms:
Na^+
Mg^2+
Fe^3+
Cl^-
S^2-
N^3-

Answer 1

Na+ Give 1 electron back to the ion
Mg2+ Give 2 electrons back to the ion
Fe3+ Give 3 electrons back to the ion
Cl- Take 1 electron away from the ion
S2- Take 2 electrons away from the ion
N3- Take 3 electrons away from the ion

Question 2

What is Electrolysis?

Answer 2

It is when an electric current is used to break down ionic compounds and turn them back into their elements.

Question 3

What do you need for Electrolysis?

Answer 3

• an electric power supply
• anode/cathode made of carbon

The positive electrode is called the anode.
The negative electrode is called the cathode.

Question 4

Where do the positive ions (cations) move during electrolysis?

Answer 4

They move to the Cathode (negative)

Opposites attract!