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Chem > Chapter 6 Redox Reactions > Flashcards

Chapter 6 Redox Reactions Flashcards

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1
Q

Oxidation Definitions

A

When a substance gains oxygen

When a substance looses electrons (oxidation state increases)

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2
Q

Reduction Definitions

A

When a substance looses oxygen

When a substance gains electrons (oxidation state reduces)

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3
Q

What is OIL RIG

A

Oxidation is loss
Redox is gain

Of Electrons

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4
Q

What does a half equation do

A

Shows the ions that take part in the reaction

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5
Q

Another name for half equatiosn

A

Ionic equations

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6
Q

What is the oxidation number

A

The number of electrons each atom of a substance has lost, gained or shared in forming a compound

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7
Q

Conditions for a redox reaction

A

Anytime electrons are transferred or the oxidation number is changed, the reaction is a redox reaction

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8
Q

What is the oxidising agent

A

Oxidises the reducing agent, while being reduced itself

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9
Q

What is the reducing agent

A

Reduces the oxidising agent, while being oxidized itself

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10
Q

Oxidation number hydrogen

A

+1

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11
Q

Oxidation number of group 1 sodium

A

+1

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12
Q

Oxidation number of group 2 calcuium

A

+2

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13
Q

Oxidation number of group 3 aluminum

A

+3

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14
Q

Oxidation number of oxygen (except peroxides)

A

-2

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15
Q

peroxide oxidation state

A

-1

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16
Q

Group 7 oxidation number

A

-1

17
Q

Iron oxidation

A

+2, +3

18
Q

Copper oxidation

A

+1, +2

19
Q

Manganese oxidation

A

+2, +4, +7

20
Q

Chromium oxidation

A

+3, +4

21
Q

Potassium magnate formula and colour change and what agent

A

KMnO4
Purple to colourless
oxidising agent - gets reduced itself

22
Q

Why is KMnO4 used

A

Oxidation state of +2, strong urge to reduce the oxidation state

Very strong Oxidising agent

Checks if there is a reducing agent in a solution

23
Q

What is potassium iodide Formula and colour change

A

KI

Colourless -> red-brown

24
Q

Why is 2KI used

A

Tests the presence of an oxidation agent

reducing agent

25
Q

when metal nitrates are thermally decomposed what are the products

A

metal nitrate —-> metal oxide + NO2 + O2

26
Q

what are exceptions to the metal nitrate decomposition?

A

group 1 nitrates

metal nitrate —-> metal nitrite + O2
nitrite is (no2)-

27
Q

when metal carbonates are thermally decomposed what are the products

A

metal carbonate —–> metal oxide + CO2

28
Q

which electrode is more reactive

A

anode

Chem (31 decks)

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