redox Flashcards

1
Q

what is a reducing agent

A

the thing that oxidizes

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2
Q

what is the oxidizing agent

A

the thing that reduced

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3
Q

the process of oxidation involves

A

loss of electrons (LEO)

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4
Q

the process of reduction involves

A

gain of electrons (GER)

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5
Q

what happens to the voltage if pure water is added to half cells

A

the voltage would decrease

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6
Q

a salt bridge does what

A

provides a path for ions to migrate between two half cells

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7
Q

what are the steps in balancing redox

A

split equation, balance major, balance O, balance H, balance charges, make electrons equal and add two half equations together

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8
Q

combination of reduced half cell and oxidation half cell is called

A

electrochemical/ galvanic cell

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9
Q

anode are where

A

oxidation occurs

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10
Q

cathode are where

A

reduction occurs

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11
Q

what is salt bridges function

A

balance charges

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12
Q

what is most common salt bridge

A

KNO3

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13
Q

operatiinf electrochemical cells are

A

not at equilibrium

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14
Q

what is a electrolysis cell

A

an apparatus in which electrolysis can occur

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15
Q

what is electroplating

A

a metel to be reduced or plated at a cathode

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16
Q

what prevents rusting

A

paint/oil/grease
keeping metal cold
catholic protection

17
Q

initial cell voltage at 25 C is

18
Q

electrolyte used in alkaline battery is

19
Q

the electrolyte in a automobile battery is

20
Q

to plate a nickel coin with copper the

A

nickel coin must be at cathode

21
Q

anode used in commercial production of AL is

22
Q

what is an example of a electrolytic cell

A

electrowinning, electroplating and charging a car battery

23
Q

what involves a nonspon redox reaction

A

electroplating

24
Q

saiting roads causes more corrosion of cars because

A

it provides a electrolyte

25
a electrolytic cell must have what to operate
a power supply
26
why does painting prevent corrosion
it prevents h20 and o2 from contracting the iron
27
what does catholic protection work
because if you add some Zn it forces the metal to be the cathode and cannot oxidize
28
how to electrons move through the cell
they move from the anode to the cathode
29
what is cell potential once equilibrium is achieved
+0.00V
30
if a solution goes from 0 to +5 it is
being oxidized
31
if a solution goes from +3 to -1 it’s being
reduced