C4.1.2 Electrolysis

What is the name of the positive electrode?

What is the name of the negative electrode?

The anions are attracted to the ________, which is the _________ electrode.

• anode, positive

• cathode, positive

• anode, negative

• cathode, negative

The cations are attracted to the ________, which is the _________ electrode.

• anode, positive

• cathode, positive

• anode, negative

• cathode, negative

For electrolysis to work, an ionic compound needs to be...

• molten

• solid

• dissolved in water (aqueous)

• in gaseous form

Which are true about molten NaCl and NaCl solution?

• NaCl solution has Na⁺, Cl^-, H⁺ and OH^- ions

• Molten NaCl has Na⁺, Cl^-, H⁺ and OH^- ions

• NaCl solution has Na⁺ and Cl^- ions only

• Molten NaCl has Na⁺ and Cl^- ions only

An ______________ is an ionic compound in molten or aqueous form that conducts electricity and is the substance we want to split into ions through electrolysis.

An _______________ is a metal or graphite (carbon) rod through which electrons flow into and out of an electrolyte.

In the electrolysis of molten lead(II) bromide using graphite electrodes, what is produced at the cathode?

• Lead (Pb)

• Hydrogen gas

• Bromine gas

• Oxygen

In the electrolysis of molten lead(II) bromide using graphite electrodes, what is produced at the anode?

• Lead (Pb)

• Hydrogen gas

• Bromine gas

• Oxygen