Electrolysis

What is the name given to the solution that is being electrolysed?

• Salt solution

• Electric solution

• Mineral solution

• Electrolyte

Copper and hydrogen can each be formed by electrolysis. At which electrodes are these elements formed?

• A

• B

• C

• D

Which substance does NOT produce a gas at both electrodes during electrolysis?

• concentrated aqueous sodium chloride

• concentrated hydrochloric acid

• dilute sulfuric acid

• molten lead(II) bromide

Which statement is correct?

• Copper forms at the anode in some electrolysis reactions.

• Hydrogen forms at the cathode in some electrolysis reactions.

• Oxygen forms at the cathode in some electrolysis reactions.

• The negative electrode is called the anode.

During the electrolysis of a concentrated solution of copper(II) chloride using carbon electrodes, the substance which forms at the anode is:

• copper

• chlorine

• oxygen gas

• hydrogen gas

For electrolysis to work the ionic compound must…

• be a solid

• be melted or dissolved in water

• have a large surface area

• be easy to separate

What type of compound can undergo electrolysis?

• Metallic

• Giant covalent

• Simple covalent

• Ionic

What is the main process occurring in an electrolytic cell?

• Chemical energy is converted into electrical energy.

• Electrical energy is converted into chemical energy.

• Thermal energy is converted into chemical energy.

• Mechanical energy is converted into electrical energy.

The solution of ions in electrolysis is called an _________ solution?

Tags

NGSS.HS-PS1-5

What type of electrochemical cell is used to perform a chemical reaction that is initiated by an electric current?

• voltaic cell

• fuel cells

• electrolytic cell

• storage cell