Worksheet: Uses of Electrolytic Cells

In this worksheet, we will practice describing conditions and applications for the electrolysis of molten salts and salt solutions.

Q1:

Which of the following would be the best choice of starting material for the production of a large quantity of oxygen by electrolysis?

  • ACarbon dioxide
  • BMetal sulfates
  • CMetal oxides
  • DMetal carbonates
  • EMetal hydroxides

Q2:

A student electroplates a key with copper.

What aqueous solution and electrode would be the best choices for this experiment?

  • ANaOH()aq and a copper electrode
  • BHSO()24aq and a graphite electrode
  • CCuSO()4aq and a graphite electrode
  • DCuSO()4aq and a copper electrode
  • EHSO()24aq and a platinum electrode

Q3:

Which diagram shows the appropriate apparatus to electroplate the iron crown with copper?

  • A
  • B
  • C
  • D

Q4:

The diagram shows the purification of copper. What are the correct labels for this experiment?

  • AA: Pure copper electrode
    B: Copper sulfate electrolyte
    C: Graphite electrode
  • BA: Impure copper electrode
    B: Copper sulfate electrolyte
    C: Graphite electrode
  • CA: Pure copper electrode
    B: Sulphuric acid electrolyte
    C: Impure copper electrode
  • DA: Pure copper electrode
    B: Copper sulfate electrolyte
    C: Impure copper electrode
  • EA: Impure copper electrode
    B: Copper sulfate electrolyte
    C: Pure copper electrode

Q5:

Which of the following metal electrodes is coated in metal using the electroplating experiment set up in the diagram?

  • AElectrode B
  • BElectrode C
  • CElectrode A
  • DElectrode D

Q6:

A student would like to electroplate a steel spoon with copper. What description of the apparatus would result in a successful experiment?

  • AUse copper(II) sulfate as the electrolyte, make the spoon the anode, and use a copper rod for the cathode.
  • BUse copper(II) sulfate as the electrolyte, make the spoon the cathode, and use an iron rod for the anode.
  • CUse iron(II) sulfate as the electrolyte, make the spoon the anode, and use a copper rod for the cathode.
  • DUse iron(II) sulfate as the electrolyte, make the spoon the cathode, and use an iron rod for the anode.
  • EUse copper(II) sulfate as the electrolyte, make the spoon the cathode, and use a copper rod for the anode.

Q7:

Which metal could not be used for electroplating through the use of an aqueous solution?

  • ACopper
  • BSilver
  • CGold
  • DChromium
  • ESodium

Q8:

What is the correct experimental setup to ensure the spoon is electroplated with silver?

  • A
  • B
  • C
  • D
  • E

Q9:

Metal cutlery can be coated in silver. Which of the following is not a reason to electroplate cutlery?

  • AEnhancing the appearance of the cutlery
  • BReducing the weight of the cutlery
  • CProtecting the cutlery from damage
  • DImproving the lifespan of the cutlery
  • EShielding the cutlery from corrosion

Q10:

Electroplating steel with tin is one way to prevent the steel from rusting. Which setup of equipment would ensure the correct results?

  • AThe anode is made from graphite, the cathode is the piece of steel we want plated, and the electrolyte is an aqueous tin salt.
  • BThe anode is made from tin, the cathode is the piece of steel we want plated, and the electrolyte is an aqueous iron salt.
  • CThe anode is the piece of steel we want plated, the cathode is made from graphite, and the electrolyte is an aqueous iron salt.
  • DThe anode is made from tin, the cathode is the piece of steel we want plated, and the electrolyte is an aqueous tin salt.
  • EThe anode is the piece of steel we want plated, the cathode is made from tin, and the electrolyte is an aqueous tin salt.

Q11:

An active metal electrode was found to lose mass as the oxidation–reduction reaction was allowed to proceed. Which part of the cell was the electrode a part of?

  • AAnode
  • BSalt bridge
  • CCathode

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