An experimental setup is prepared to investigate the electrolysis of different substances.
Name the particles that flow through the copper connecting wires to carry the electrical current.
The electrodes used in the investigation are made of carbon (graphite), which is an inert material. State what is meant by the term inert in this context.
Explain why a sample of solid zinc chloride, ZnCl2\text{ZnCl}_2ZnCl2, must be heated until molten before electrolysis can occur.
When concentrated aqueous potassium chloride, KCl(aq)\text{KCl(aq)}KCl(aq), is electrolysed, two gases form at the positive electrode (anode) and one gas forms at the negative electrode (cathode). The ions present in the solution are K+\text{K}^+K+, Cl−\text{Cl}^-Cl−, H+\text{H}^+H+, and OH−\text{OH}^-OH−.
Name the gases formed at each electrode:
Positive electrode: ________ and _______
Negative electrode: ________
Give the ionic half-equations to show the formation of each of these three gases.
The ionic half-equation for the deposition of silver in another cell is:
Ag++e−→Ag \text{Ag}^+ + \text{e}^- \rightarrow \text{Ag} Ag++e−→AgDuring this electrolysis, a charge of 0.060 faradays0.060\text{ faradays}0.060 faradays passes through the cell. Calculate the mass of silver metal formed. [Ar(Ag)=108][A_r(\text{Ag}) = 108][Ar(Ag)=108]
