Galvanic cells

In a Galvanic Cell, the anode is...

• positive

• negative

Oxidation occurs at the...

• anode

• cathode

In a Galvanic cell, the electrons flow from the...

• anode to the cathode

• cathode to the anode

E_cell =

• E_red - E_ox

• E_red + E_ox

• E_ox - E_red

• E_ox + E_red

In a redox reaction, the oxidising agent... (choose two options)

• is oxidised

• is reduced

• increases its oxidation number

• decreases its oxidation number

In a Galvanic Cell, the salt bridge...

• completes the circuit so that electrons can flow through the wire

• maintains charge balance

• is soaked in an unreactive electrolyte such as KNO₃

• all of the above

A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg

Which is the half-reaction occurring at the anode?

• HgO + 2 e- → Hg + O^2-

• Zn²⁺ + 2 e- → Zn

• Zn → Zn²⁺ + 2 e-

• ZnO + 2 e- → Zn

What is the standard electrode which all other standard electrode potentials are measured against?

• helium

• hydrogen

• magnesium

• potassium

Consider the galvanic cell given.
Which of the following deductions about this cell is correct?

• Oxidation is occurring in half-cell 2
• The positive electrode is in half-cell 2
• Oxidation is occurring in half-cell 1
• The negative electrode is in half-cell 1

A VCE chemistry student sets up a galvanic cell using two standard half-cells with half reactions.
Half-cell 1: Cr³⁺(aq)+e^-→Cr²⁺(aq)
Half-cell 2: Cr(s)→Cr²⁺(aq)+2e^-
Sutable materials for the electrodes of te two half-cells are

• Half-cell 1: Platinum; Half-cell 2: Platinum
• Half-cell 1: Platinum; Half-cell 2: Chromium
• Half-cell 1: Chromium; Half-cell 2: Chromium
• Half-cell 1: Chromium; Half-cell 2: Platinum