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 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

Tags

NGSS.HS-PS2-5

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

• Cu | Cu²⁺

• Zn | Zn²⁺

Tags

NGSS.HS-PS1-2

In any Galvanic Cell, which half cell will undergo reduction?

• The half cell with the lower standard electrode potential

• The half cell with the higher standard electrode potential

If an electrochemical reaction is spontaneous, what will E_cell be?

• positive

• negative

Consider the galvanic cell reaction Zn (s) + Cu²⁺ (aq) → Cu (s) + Zn²⁺ (aq) When the cell is running spontaneously, which is the only true statement?

• The copper electrode loses mass and the zinc electrode is the cathode.

• The copper electrode gains mass and the copper electrode is the cathode.

• The zinc electrode gains mass and the zinc electrode is the anode.

• The zinc electrode loses mass and the zinc electrode is the cathode.

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

Which is the half-reaction occurring at the cathode?

• HgO + 2 e- → Hg + O^2-

• Hg → Hg²⁺ + 2 e-

• Zn → Zn²⁺ + 2 e-

• ZnO + 2 e- → Zn