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Worksheets10.3 Electrolytic Cell
Total questions: 10
Worksheet time: 50mins
What is an electrolytic cell?
a cell that converts chemical energy into electrical energy
a cell that converts electrical energy into electrical energy
a cell that converts electrical energy into chemical energy
a cell that converts kinetic energy into potential energy.
In an electrolytic cell, the positive electrode is the
anode, where oxidation occurs
anode where reduction occurs
cathode where oxidation occurs
cathode where reduction occurs
Object is electroplated with chromium using chromium(III) nitrate. Which statement is correct?
Positive electrode increases in mass
Concentration of Cr3+ ions in solution decreases
Reduction occurs at positive electrode
Reaction at negative electrode is Cr3+ + 3e– → Cr
Which one of the following statements is true for both galvanic cells and electrolytic cells?
Reduction occurs at the negative electrode in both cells.
Reduction occurs at the cathode in both cells.
Anions migrate to the cathode in both cells.
The anode is positive in both cells.
Selected species produced at positive/negative electrodes during electrolysis of molten NaCI?
A
B
C
D
Which of the following is the balanced half -reaction for the oxidation of Cu to Cu+2?
Cu → Cu2+
Cu + 2e- → Cu2+
Cu → Cu2+ + 2 e-
Cu - 2e- → Cu2+
Diagram shows an electrolytic cell.
Which of the substance causes the bulb to light up when electricity passes through it?
Ethanol
Dilute ethanoic acid
Solid lead(II) bromide
Tetrachloromethane
Diagram shows the electrolysis of concentrated copper(II) chloride solution using carbon as electrodes.
Which of the following is the correct half-equation representing the reaction at anode?
4OH- → 2H2O + O2 + 4e-
2Cl- → Cl2 + 2e-
Cu → Cu2+ + 2e-
Cu2+ + 2e- → Cu
Molten X is electrolysed using carbon electrodes. After 10 minutes, a brown solid is deposited on the cathode and a brown gas is released at the anode. What is molten X?
Lead(II) chloride
Lead(II) bromide
Copper(II) chloride
Copper(II) bromide
Diagram shows electrolysis of dilute sulphuric acid. Identify gas X and the half-equation occurring at the cathode?
Carbon dioxide, C + O2 → CO2
Hydrogen, 2H+ + 2e- →H2
Oxygen, 4OH- → H2O + O2 + 4e-
Sulphur dioxide, SO4 2- → SO2 + O2 + 2e-
