Y11 Electrolysis

Which of these is an electrolyte? Tick all that apply.

• A molten ionic substance

• An aqueous solution of an ionic substance

• A molten giant covalent lattice

• An aqueous solution of a giant covalent lattice

Answer explanation

Electrolytes are molten ionic compounds or aqueous solutions of ionic compounds

What is electrolysis?

• A process in which electrical energy from direct current produces an electroyte

• A process in which electrical energy from alternating current decomposes an electrolyte

• A process in which electrical energy from direct current decomposes an electrolyte

• A process in which electrical energy from alternating current produces an electrolyte

What is the charge on cations?

• Positive

• Negative

What is the charge on anions?

• Positive

• Negative

Cations are formed by

• metals

• non-metals

Anions are formed by

• Metals

• Non-metals

During electrolysis, cations move to the

• anode

• cathode

During electrolysis, anions move to the

• anode

• cathode

An H+ ion is a(n)

• anion

• cation

When copper chloride solution is electrolysed, the products are:

• copper at the anode and

  chlorine at the cathode

• hydrogen at the anode and

  oxygen at the cathode

• chlorine at the anode and

  copper at the cathode

• oxygen at the anode and

  hydrogen at the cathode