Electrolytic Cells

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7 Terms

1
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In an electrolytic cell WHAT energy is used to force a WHAT chemical reaction to occur ( opposite of a WHAT cell)

In an electrolytic cell ELECTRICAL energy is used to force a NON-SPONTANEOUS chemical reaction to occur ( opposite of a VOLTAIC cell)

2
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These reactions have a WHAT (E°net)

NEGATIVE

3
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Commonly used to WHAT (eg, gold, silver, bronze, chromium), WHAT and split compounds into WHAT (eg. H2, O2, Cl2)

Commonly used to ELECTROPLATED METALS (eg, gold, silver, bronze, chromium), RECHARGE BATTERIES and split compounds into USEFUL GASES (eg. H2, O2, Cl2)

4
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The electrolytic cell is hooked up to a WHAT (instead of load or external circuit) so the flow of electrons is WHAT

The electrolytic cell is hooked up to a BATTERY or POWER SOURCE (instead of load or external circuit) so the flow of electrons is “PUSHED“ by an OUTSIDE FORCE

5
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The CATHODE of the electrolytic cell is connected to the WHAT if the battery therefor is WHAT

The CATHODE of the electrolytic cell is connected to the ANODE if the battery therefor is NEGATIVE

6
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The ANODE of the electrolytic cell is connected to the WHAT if the battery therefor is WHAT

The ANODE of the electrolytic cell is connected to the CATHODE if the battery therefor is POSITIVE

7
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Voltaic cells:

  • What to what energy

  • Cathode (WHAT), anode (WHAT)

  • Usually contains a WHAT

  • E°net is WHAT (WHAT)

  • Has a WHAT

Electrolytic cells

  • What to what energy

  • Cathode (WHAT), anode (WHAT)

  • Usually doesn’t contains a WHAT

  • E°net is WHAT (WHAT)

  • Has a WHAT

Both

  • Electrons flow from the WHAT to the WHAT

  • Oxidation at the WHAT

  • Reduction at the WHAT

  • Cations migrate to the WHAT

  • Anions migrate to the WHAT

Voltaic cells:

  • CHEMICAL to ELECTRICAL energy

  • Cathode (POSITIVE), anode (NEGATIVE)

  • Usually contains a POROUS CUP or SALT BRIDGE

  • E°net is POSITIVE (SPONTANEOUS)

  • Has a VOLTMETER or EXTERNAL LOAD

Electrolytic cells

  • ELECTRICAL to CHEMICAL energy

  • Cathode (NEGATIVE), anode (POSITIVE)

  • Usually doesn’t contains a POROUS CUP or SALT BRIDGE

  • E°net is NEGATIVE (NON-SPONTANEOUS)

  • Has a POWER SUPPLY

Both

  • Electrons flow from the ANODE to the CATHODE

  • Oxidation at the ANODE

  • Reduction at the CATHODE

  • Cations migrate to the CATHODE

  • Anions migrate to the ANODE