Quiz on Electrolysis

What does the word "electrolysis" mean?

• Heating a substance until it melts

• Breaking down a substance using electricity

• Mixing two chemicals together

• Freezing a liquid to form a solid

What is needed for electrolysis to take place?

• A Bunsen burner, a metal rod, and water

• An electrolyte, two electrodes, and a power supply

• Only a battery and some water

• A thermometer and some acid

What is an electrode?

• A type of battery

• A conductor that allows electricity to enter or leave the electrolyte

• A metal wire used to heat a solution

• A type of gas formed during electrolysis

What are the names of the two electrodes in electrolysis?

• Positive and Negative

• Anode and Cathode

• Electrolyte and Electrode

• Cation and Anion

Which electrode do positive ions move towards?

• The anode (positive electrode)

• The cathode (negative electrode)

• Both electrodes

• They do not move

Which electrode do negative ions move towards?

• The anode (positive electrode)

• The cathode (negative electrode)

• Both electrodes

• They do not move

When using copper electrodes, what happens to the anode?

• Nothing

• Gains mass

• Loses mass

Why can't solid ionic compounds be used for electrolysis?

• They do not contain any electrons

• The ions are fixed in place and cannot move

• They evaporate too quickly

• They conduct electricity too well

What is formed at the cathode in the electrolysis of molten lead bromide?

• Bromine gas

• Lead metal

• Hydrogen gas

• Oxygen gas

What is formed at the anode in the electrolysis of molten lead bromide?

• Bromine gas

• Lead metal

• Hydrogen gas

• Oxygen gas