Electrolysis

During the electrolysis of molten lead (II) bromide the products formed are ...

• Lead and bromide

• Lead and bromine

• Lead and oxygen

• Hydrogen and bromine

During the electrolysis of copper sulfate solution, copper is formed because it is ______ reactive that hydrogen

• less

• more

During the electrolysis of sodium sulfate solution, hydrogen is formed because sodium is ______ reactive that hydrogen

• more

• less

oxygen is always formed at the -ve electrode unless there is a __________ in the solution

• halide

• alkali

• noble gas

• alkali earth metal

What kind of Electrical Current does Electroysis require?

• Direct
• Indirect
• Anternative
• A alternating

Explain why the electrolyte has to be a liquid.

• So the ions can move
• So the electrons can move
• So that it doesn't get too hot
• So the fish are ok

Positive ions (cations) will move towards the negative electrode where they will discharge by....

• Breaking apart

• Losing electrons

• Clumping together.

• Gaining electrons

What do you add to aluminium ore to reduce its melting temperature?

• Dendrite

• Malachite

• Bauxite

• Cryolite

Choose the half-equation that shows the discharge of aluminium at the negative electrode.

• Al³⁺ - 3e^- --> Al

• Al²⁺ + 3e^- --> Al

• Al³⁺ + 3e^- --> Al

• Al³⁺ --> Al + 3e^-

What is the half-equation for the discharge of hydroxide ions?

• 2O^2- --> O₂ + 4e^-

• OH^- --> OH + e

• 4OH^- --> 2H₂O + O₂ + 4e^-

• 2H₂O + O₂ + 4e^- --> 4OH^-