Y10 Electrolysis Principles

What does electrolysis mean?

• Breaking down compounds into their elements using electricity

• Combining elements to make compounds using electricity

• Breaking down compounds into their elements to generate electricity

• Combining elements to make compounds and generate electricity

What is an ionic compound?

• A combination of metal and non-metal elements chemically bonded by electrostatic forces of attraction

• A combination of metal and non-metal elements chemically bonded by sharing electrons

• A combination of different non-metal elements chemically combined by sharing electrons

• A combination of metal elements chemically combined by electrostatic forces of attraction

The melting points of ionic compounds are usually...

• high

• low

What is a cation?

• A positively charged ion

• A negatively charged ion

What is an anion?

• A positively charged ion

• A negatively charged ion

What is the charge on the cathode?

• Positive

• Negative

Which electrode, P or Q, is the anode in the diagram?

• P

• Q

In which direction will the electrons flow in the electrolysis cell shown?

• From P to Q

• From Q to P

At the cathode sodium ions can be discharged as sodium atoms. Which word represents the chemical change occurring?

• Oxidation

• Reduction

During the electrolysis of molten magnesium chloride, what will be produced at the anode?

• Sodium metal

• Hydrogen gas

• Oxygen molecules

• Chlorine molecules