RPA Science GCSE Chemistry Electrolysis RP

What is electrolysis used for?

• Breaking down compounds using electricity

• Creating compounds using electricity

• Breaking down compounds using heat

• Creating compounds using heat

What chemical is used in the experiment?

• Copper chloride

• Sodium sulfate

• Both copper chloride and sodium sulfate

• None of the above

What is the purpose of submerging the electrodes in the liquid?

• To prevent the electrodes from touching each other

• To ensure the electrodes are close to the crocodile clips

• To prevent the formation of bubbles

• To allow the flow of electricity through the liquid

What is the positive terminal called?

• Anode

• Cathode

• Red wire

• Black wire

What gas is formed at the positive electrode in the copper chloride experiment?

• Oxygen

• Hydrogen

• Chlorine

• Carbon dioxide

Don't PANIC

The positive electrode is called the _______________ the negative electrode is called the _________________

• cathode

  anode

• anode

  cathode

• anion

  cation

• cation

  anion

What is formed at the bottom of the electrode in the copper chloride experiment?

• Copper metal

• Chlorine gas

• Sodium sulfate

• Oxygen gas

What gas is formed at the negative electrode in the sodium sulfate experiment?

• Oxygen

• Hydrogen

• Chlorine

• Carbon dioxide

What additional product is formed at the cathode in the sodium sulfate experiment?

• Water

• Copper metal

• Chlorine gas

• Sodium chloride

Which represents the electron in a half equation?

• E

• -

• e-

• n