In electrolysis, what is the name of the negative electrode?
Electrolyte
Cathode
Anode
What happens at the anode during electrolysis?
Negative ions gain electrons
Positive ions gain electrons
Negative ions lose electrons
In the electrolysis of molten lead bromide, what is the product at the anode?
Lead
Bromine
Oxygen
In the electrolysis of copper nitrate solution, what is the product at the cathode?
Hydrogen
Copper
In the electrolysis of a solution, which ions from water are attracted to the anode?
Hydroxide, OH-
Oxide, O2-
Hydrogen, H+
In the electrolysis of sodium chloride solution, what is the product at the cathode?
Sodium
Chlorine
What is a hypothesis?
Something that is shown by evidence from an experiment
An idea to be tested by experiment, backed up by scientific knowledge
The longest side of a right-angled triangle
What is reduction? - Higher
Adding oxygen
Losing electrons
Gaining electrons
Which half equation represents the reaction at the cathode in the electrolysis of molten copper chloride? - Higher
2Cl- → Cl2 + 2e-
Cu2+ + 2e- → Cu
2H+ + 2e- → H2
Which half equation represents a reaction at the anode in the electrolysis of aqueous sodium nitrate? - Higher
Na+ + e- → Na
4OH- → 2H2O + O2 + 4e-