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HIGHER CHEMISTRY > Redox > Flashcards

Redox Flashcards

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1
Q

Is oxidation loss or gain of electrons

A

Loss

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2
Q

Is reduction loss or gain of electrons

A

Gain

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3
Q

How to balance O atoms

A

Water

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4
Q

How to balance charge

A

Electrons

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5
Q

How to balance H atoms

A

H ions

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6
Q

First step of balancing redox

A

Ensure elements are balanced

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7
Q

2x if the reaction contains… it is redox

A

Reaction involves a metal atom
Reaction involves molecules and ions of the same nonmetal

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8
Q

2x if the reaction contains… it is not a redox

A

Neutralisation
Precipitation

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9
Q

Spectator ions in redox

A

Sodium
Potassium

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10
Q

Define an oxidising agent

A

An oxidising agent is a substance that gains electrons during a chemical reaction and is reduced (it is itself reduced)

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11
Q

Define an reducing agent

A

A reducing agent is a substance that loses electrons during a chemical reaction and is oxidised (it is itself oxidised)

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12
Q

Where are the strongest oxidisers found

A

Bottom of p13

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13
Q

Where are the strongest reducers found

A

Top of p13

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14
Q

Are elements with low electronegativities reducers or oxidisers

A

Reducing agents

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15
Q

Why are elements with low electronegativities reducers

A

Because they tend to form ions by losing electrons and so act as reducing agents.

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16
Q

Are elements with high electronegativities reducers or oxidisers

A

Oxidising agent

17
Q

Why are elements with high electronegativities oxidisers

A

Because they tend to form ions by gaining electrons and so act as oxidising agents.

18
Q

Group for the strongest reducing agents

A

Group 1

19
Q

Group for the strongest oxidising agents

A

Group 7

20
Q

Use for oxidising agents and why

A

Inactivate viruses because of their effectiveness in killing fungi and bacteria.

21
Q

4 compounds/group ions/molecule that exist as oxidising agents

A

Hydrogen peroxide
Dichromate
Permanganate
Iodine

22
Q

Iodine use

A

Treat wounds

23
Q

Gas used as reducing agent and where its used

A

Carbon monoxide - use to extract metal from ore

24
Q

Potassium permanganate use

A

Used to treat skin infections

25
Q

Acidified dichromate colour change (oxidation)

A

orange to green

26
Q

Acidified permanganate changes (oxidation)

A

purple to colourless

HIGHER CHEMISTRY (6 decks)

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