Electrolysis involves using electricity to break down electrolytes to form elements. The products of electrolysis can be predicted for a given electrolyte. Copper can be purified using electrolysis.
Sodium chloride is an ionic compound. When could it act as an electrolyte?
When it is solid or liquid
When it is solid or dissolved in water
When it is liquid or dissolved in water
What name is given to a positively charged ion?
What is produced during the electrolysis of molten zinc chloride?
Zinc is formed at the anode and chlorine at the cathode
Zinc is formed at the cathode and chlorine at the anode
Hydrogen is formed at the cathode and chlorine is formed at the anode
What is produced during the electrolysis of aqueous copper bromide?
Copper at the cathode and bromine at the anode
Hydrogen at the cathode and bromine at the anode
Copper at the cathode and oxygen at the anode
What is produced during the electrolysis of water, acidified with dilute sulfuric acid?
Hydrogen at the cathode and sulfur at the anode
Hydrogen at the cathode and oxygen at the anode
Oxygen at the cathode and hydrogen at the anode
Which of the following substances could make inert electrodes for the electrolysis of copper(II) sulfate solution?
Which ions are present in dilute nitric acid?
H+ and OH- only
H+ and NO3- only
H+, OH- and NO3-
Which conditions would be suitable for electroplating a steel fork with silver?
Silver anode and aqueous silver nitrate electrolyte
Silver cathode and aqueous silver nitrate electrolyte
Silver anode and aqueous iron nitrate electrolyte
At which electrode does a metal or hydrogen form during electrolysis?
The positive electrode
The negative electrode
It depends on the metal in the salt
What electrodes are used for the industrial purification of copper by electrolysis?
Purified copper anode and impure copper cathode
Purified copper cathode and impure copper anode
Purified copper cathode and graphite anode