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WorksheetsElectrolysis
Total questions: 10
Worksheet time: 4mins
During the electrolysis of molten sodium chloride what is produced at the cathode?
Na (s)
Cl (g)
Cl2 (g)
Na (l)
Which is the correct half equation for the anode during the electrolysis of molten lead bromide?
Pb2+ + 2e- --> Pb (l)
2Br - + 2e - --> Br2 (g)
Pb2+ --> Pb (l) + 2e-
2Br - --> Br2 (g) + 2e -
Electrolysis of which does not give Cl2(g) at the anode?
concentrated NaCl(aq)
NaCl (l)
dilute NaCl(aq)
PbCl2 (l)
Which determines what is discharged at an electrode?
the relative Eo values of the ions
the concentration of the ions in the electrolyte
the nature of the electrode
all of the above
During the electrolysis of CuSO4(aq) with inert electrodes
Cu(s) is formed at the cathode and the solution stays blue
Cu(s) is formed at the anode and the solution becomes paler
Oxygen is formed at the anode and the solution stays blue
Oxygen is formed at the anode and the solution becomes paler
During the electrolysis of CuSO4(aq) with copper electrodes
the cathode increases in mass
the cathode decreases in mass
the anode increases in mass
the solution becomes paler
1 Faraday is:
The charge carried by I mole of electrons
96,500 C
required to turn 1 mole of sodium ions into sodium atoms
all of the above
what is common about the electrolysis of NaOH(aq), H2SO4(aq) and dilute NaCl(aq)
hydrogen gas is produced at the cathode
chlorine gas is produced at the anode
sodium is produced at the cathode
they have nothing in common
Which produced the most amount of metal at the cathode
CuCl electrolysed for 3 mins with 2.0 A
CuCl2 electrolysed for 3 mins with 2.0 A
CuCl electrolysed for 2 mins with 2.5 A
CuCl2 electrolysed for 2 mins with 2.5 A
During silver plating of an object which is true?
The object to be plated is the cathode
The object to be plated is the anode
The electrolyte is copper sulphate
The cathode must be made of silver
