Redox Flashcards

1
Q

Combine

Li –> LI+ + e-
O2 + 4e- –>2O2-

A

4Li + O2 –> 4Li+ + 2O2-

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2
Q

Whats the oxidation state of C in CaCO3

A

+4

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3
Q

How do you combine 2 half equations ?

A

Balance the electrons in both equations
Add all products together and add all reactants together

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4
Q

How do you balance a half equation ?

A

Balance main atom
Balance oxygen with H2O
Balance hydrogens with H+
Balance charge with e-

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5
Q

What has happened to a element if the oxidation state has decreased ?

A

It has been reduced

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6
Q

Is this reduction or oxidation ?

Na –> Na+ +e-

A

Oxidation

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7
Q

Balance

O2 –> H20

A

4e- + 4H+ +O2 –> 2H2O

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8
Q

What order should you assign oxidation states in ?

A

Uncombined metals
Metals
Fluorine
Hydrogen
Oxygen
Chlorine

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9
Q

Is this reduction or oxidation ?

Fe3+ +e- –> Fe2+

A

Reduction

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10
Q

What is the oxidising agent ?

A

Electron acceptor (itself is reduced)

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11
Q

what has happened to a element if the oxidation state has increased ?

A

It has been oxidised

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12
Q

Whats the oxidation state of V in VO2+

A

+5

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13
Q

Name NO3-

A

Nitrate(V)

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14
Q

What is the reducing agent ?

A

Electron donor (itself is oxidised)

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15
Q

What is the oxidation state of a ion/complex ion ?

A

Its charge

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16
Q

Whats the formula for Iron(II)Chloride ?

A

FeCl2

17
Q

What does OILRIG stand for ?

A

Oxidation is loss (of electrons)
Reduction is gain (of electrons)

18
Q

What is the oxidation state for a compound with no charge ?

A

0

19
Q

What is the oxidation state of a uncombined element ?

A

0