Electrolysis of molten ionic compounds Combined Sc

What is the name of the positive electrode?

• cathode
• anode

What is the name of the negative electrode?

• cathode
• anode

The negatively charged ions (anions) are attracted to the ________.

• anode

• cathode

The positive ions (cations) are attracted to the ________.

• anode

• cathode

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 molten (melted)?

• ions can move ( are mobile) when molten state

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

• ions cannot move when molten

What ions are present in molten aluminium oxide, Al₂O₃?

• Al³⁺, O^2-, H⁺, OH^-

• Al³⁺, O^2-

• Al³⁺, OH^-

What ions are present in molten sodium chloride, NaCl?

• Mg2⁺,Cl^-

• Al³⁺, O^2-

• Na⁺, Cl^-

When a negative ion reaches the anode, they will ................ electron

• lose

• gain

When a positive ion reaches the cathode, they will ................ electron

• lose

• gain

When Br- ions lose electron they become

• Br atom. There is no charge.

• Br ion. There is a charge