C3.4 Electrolysis of binary compounds

Please enter your full name and year group.

Electrolysis is used to separate an __________ compound.

Define binary.

• contains only 0's and 1's.

• contains only positive and negative

• contains only 2 parts

• contains more than 2 parts

Which statements are true? Tick as many boxes as you need.

• metals form positive ions

• metals form negative ions

• non-metals form positive ions

• non-metals form negative ions

ionic compounds are made of ____________metal ions and __________non-metal ions.

What is the 'golden rule' of electrolysis?

• metals are positive

• non-metals are negative

• Hydrogen is a rule breaker

• opposites attract

Define ionic.

• A compound that contains non-metals only

• A compound that contains metals and non-metal atoms

• A compound that contains metal and non-metal ions.

• A compound that contains metal atoms only

Why must an ionic compound be a liquid to make electrolysis work? (tick all that apply)

• The ions need to be ionised

• A solid ionic compound can carry an electrical charge.

• A liquid ionic compound can carry an electrical charge.

• To make it easier for the electricity to travel.

An ionic compound must be ____________ to allow the ions to carry an electrical charge.

Why is it less expensive to dissolved a solid ionic compound than to melt it?

• It costs less money

• Melting solids needs a lot of energy

• dissolving solids needs a lot of energy

• the more energy we use, the more expensive the process is.