Unit C: Electrochemical Changes Module 6 Flashcards

1
Q

Voltaic Cell

A

spontaneous reaction,

converts chemical energy into electrical energy

positive standard cell potential

regular neg/pos for the cathode/anode

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2
Q

Anode

A

where oxidation occurs

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3
Q

Cathode

A

where reduction occurs

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4
Q

Cell Notation

A

anode/electrolyte//electrolyte/cathode

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5
Q

Where do electrons flow in a voltaic cell

A

anode to cathode

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6
Q

Inert Electrodes

A

used when the solutions aren’t metals to provide an inert surface for the half reaction to occur and the external wires to be connected to.

Must be conductors

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7
Q

Standard Cell Potential / Equation

A

max electrical potential difference of a cell

energy difference btw the cathode half cell and anode half cell

Enet= E cathode- E anode

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8
Q

Changing reference half cell

A

add the reduction potential to other cells, add if neg subtract if pos

won’t effect standard cell potential

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9
Q

Primary Cell

A

a closed cell that can’t be recharged

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10
Q

Secondary Cell

A

a closed cell that can be recharged (recharge by adding energy which reverses the reaction)

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11
Q

Fuel Cell

A

an open cell that requires continuous addition of fuel

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12
Q

Electrochemical basis of corrosion

A

corrosion is a process that degrades metals electrochemically, it works like a voltaic cell w a spontaneous reaction

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13
Q

Corrosion Prevention

A

cover with another metal / make an alloy

use a paint oils or grease

cathodic protection by forcing it to become the cathode

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14
Q

Electrolytic Cell

A

non spontaneous reaction

converts electrical energy into chemical energy

negative standard cell potential

opposite negativity/positive for cathode/anode

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15
Q

Electrolyte notation

A

anode/electolyte/cathode

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16
Q

The Chloride Anomaly

A

electrolysis solutions that have chloride ions and water as the only reducing agents then the chlorine will lose its electrons even though its weaker then water

17
Q

Calculating Charge

A

Q=I multiplied by t (coulombs , amps, sec)

18
Q

Faradays constant

A

amount of coulombs of charge transferred for every mole of electrons that flow through the cell