AP Electrochemistry

In electrolysis (electrolytic cell), particles which move towards cathode are called

• anions

• cations

• photons

• positrons

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Electrochemical cells convert

• mechanical energy in to electrical energy

• potential energy in to electrical energy

• electrical energy in to chemical energy

• chemical energy in to electrical energy

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16H+ + 5Fe + 2Mn04- ---> 5Fe2+ + 2Mn2+ + 8H2O

WHICH IS OXIDISED?

• MnO4-

• Fe

• Fe2+

• Mn2+

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NGSS.HS-PS1-2

A voltaic cell is established to power a torch, as shown.

For this cell, the overall equation will be

• 2Al(s)+3H_2(g)→2Al³⁺(aq)+6H⁺(aq)

• 3Cl^-(aq)+Al(s)→AlCl₃(aq)

• 2Al³⁺(aq)+3H_2(g)→2Al(s)+6H⁺(aq)

• 2Al(s)+6H⁺(aq)→2Al³⁺(aq)+3H₂(g)

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NGSS.HS-PS1-2

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A voltaic 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

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In a Galvanic Cell, the cathode is...

• positive

• negative

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In an electrolytic cell, the electrons flow from the...

• anode to the cathode

• cathode to the anode

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In a Voltaic Cell, which half cell is undergoing reduction?

• Cu | Cu²⁺

• Zn | Zn²⁺

Given their standard reduction potentials, which of the species is going to be oxidized?

Cu²⁺/Cu = 0.34V

Zn²⁺/Zn = -0.76V

• Cu

• Zn

• CuSO4

• ZnSO4

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NGSS.HS-PS1-2

Given their standard reduction potentials, calculate the cell potential.

Cu²⁺/Cu = 0.34V

Zn²⁺/Zn = -0.76V

• -1.1 V

• 1.1 V

• 0.42 V

• -0.42 V

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