Galvanic cells

In a Galvanic Cell, the anode is...

• positive

• negative

Reduction occurs at the...

• anode

• cathode

E_cell =

• E_red - E_ox

• E_red + E_ox

• E_ox - E_red

• E_ox + E_red

In the list of standard electrode potentials, the strongest reducing agent is...

• K

• K⁺

• F₂

• F^-

In the list of standard electrode potentials, the strongest oxidising agent is...

• K

• K⁺

• F₂

• F^-

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 cations in the salt bridge...

• flow the same way as the electrons flow in the wire

• flow the opposite way to the electron flow in the wire

• stay in the salt bridge

In the above Galvanic Cell, which half cell is undergoing reduction?

• Cu | Cu²⁺

• Zn | Zn²⁺

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^-

Using this information, we can determine that;

• Half-cell 1 is the anode, where oxidation occurs

• Half-cell 1 is the cathode, where reduction occurs

• No spontatneous reaction will occur, since only chromium is involved

• Cr³⁺ is the reductant, since it undergoes reduction

A galvanic cell is established to power a torch, as shown.
For this cell, the

• electrons will flow from the aluminium to the hydrogen half-cell
• aluminium electrode will be the positive anode
• concentration of aluminium ions in solution will be falling
• hydrogen half-cell will be the negative cathode