electrolysis

What is electrolysis?

• breaking down of a compound using a current
• making a compound using a current

What is the name of the negative electrode?

• cathode
• anode

The diagram shows the electrolysis of lead(II) bromide using inert electrodes. Why does the bulb only light up when the lead(II) bromide is melted?

• Bromine atoms in lead(II) bromide are converted to ions when it is melted

• Electrons flow through the lead(II) bromide when it is melted

• The ions in lead(II) bromide are mobile charge carriers in the molten state.

• There are no ions in solid lead(II) bromide

Anions get discharged by ________ electrons at the ___________

• gaining, cathode

• losing, anode

• gaining, anode

• losing, cathode

What ions are present in molten aluminium oxide?

• Al³⁺, O^2-, H⁺, OH^-

• Al³⁺, O^2-

• Al³⁺, OH^-

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

___________ electrode is an inert electrode.

• Copper

• Iron

• Carbon

• Zinc

What particle carries the charge in the wire?

• electron
• proton
• ion
• atom

Positive ions (cations) will move towards the cathode (-) where they will discharge by....

• Breaking apart
• Losing electrons
• Clumping together.
• Gaining electrons

What is the equation to show what happens to Cl ions at the anode.

• Cl^- --> Cl + e-   
• 2Cl^- --> Cl₂ + 2e-   
• Cl₂ + 2e-   2Cl^- 
• Cl₂ + 2e-  _-->  2Cl^-