Galvanic part 1

Pt(s) | Fe2+(aq), Fe3+(aq) || X+(aq) | X(s)
Write down the type of electrochemical cell illustrated above

• Volts cell

• Galvanic cell

• Electrolytic cell

• Electrolysis cell

What does the single line (|) in the cell notation represent?

• phase boundary

• salt bridge

• cathode

• anode

Pt(s) | Fe2+(aq), Fe3+(aq) || X+(aq) | X(s)
Select the half-reaction that takes place at the anode in the above cell.

• Fe3+ + e-→ Fe2+

• Fe2+→ Fe + 2e-

• Fe→ Fe2+ + 2e-

• Fe2+→ Fe3+ + e-

Pt(s) | Fe2+(aq), Fe3+(aq) || X+(aq) | X(s)
Identify X

• Magnesium/Mg

• Aluminium/Al

• Silver/Ag

• Copper/ Cu

A Pt(s) | Fe2+(aq), Fe3+(aq) half-cell is connected to a Cu(s) | Cu2+(aq) half-cell. What is the NAME of the OA

• Iron(III) (ions)

• Copper(II) (ions)

• Iron

• Copper

Galvanic cells

• have a cathode and an anode

• produces electricity

• are redox reactions

• All of the above

Sn2+(aq) + 2Ag+(aq) → 2Ag(s) + Sn4+(aq).
Name a substance that should be used as an electrode in the anode half-cell.

• Platinum/Pt

• Sn4+

• Ag+

• Tin

Answer explanation

When the half reactions do not include conductors/ metals (i.e. when the half-cell

involves gases/ ions), unreactive/ inert electrodes are used, e.g. carbon or platinum.

It is a short hand abbreviation of the voltaic reactions in a voltaic cell

WHICH IS ANODE?

• COPPER ELECTRODE

• ZINC ELECTRODE

• ZINC SULFATE SOLUTION

• SALT BRIDGE

Which represents reduction process occurring in standard hydrogen electrode?

• H_2(g) → 2H⁺_(aq) + 2e^–
• H⁺_(aq) + OH^–_(aq) → H₂O_(l)
• 2H⁺_(aq) + 2e^– → H_2(g)
• O_2(g) + 4H⁺_(aq) + 4e– → 2H₂O_(l)