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H Chemistry > 1.3 Oxidising And Reducing Agents > Flashcards

1.3 Oxidising And Reducing Agents Flashcards

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1
Q

What is reduction?

A

A gain of electrons by a reactant in any reaction

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2
Q

What is oxidation?

A

A loss of electrons by a reactant in any reaction.

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3
Q

What takes place at the same time in a redox reaction?

A

Reduction and oxidation

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4
Q

What is an oxidising agent?

A

A substance that accepts electrons

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5
Q

What is a reducing agent?

A

A substance that donates electrons

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6
Q

What can be identified from a redox reaction?

A

Oxidising and reducing agents

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7
Q

What happens to elements with low electronegativities?

A

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

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8
Q

What happens to elements with high electronegativities?

A

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

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9
Q

What are the strongest reducing and oxidising agents in the periodic table?

A

Reducing agents - group 1
Oxidising agents - group 7

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10
Q

What can act as oxidising/reducing agents

A

compounds, group ions and molecules.

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11
Q

What can be combined to produce redox equations?

A

ion-electron equations

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12
Q

How can ion-electron equations be balanced?

A

by adding appropriate numbers of water molecules, hydrogen ions and electrons.

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13
Q

Where are the strongest reducing agents

A

At the top right hand column of the electrochemical series?

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14
Q

Where are the strongest oxidising agents?

A

At the bottom left hand column of the electrochemical series.

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15
Q

What does the electrochemical series represent?

A

A series of reduction reactions.

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16
Q

What is the oxidation process an effective means of?

A

breaking down coloured compounds, making oxidising agents ideal for use as ‘bleach’ for clothes and hair.

17
Q

Why are oxidising agents widely used?

A

because of the effectiveness with which they can kill fungi and bacteria, and can inactivate viruses.

18
Q

What is carbon monoxide good for?

A

being a gas that can be used as a reducing agent

19
Q

What are dichromate and permanganate ions?

A

Group ions that are strong oxidising agents in acidic solutions

20
Q

What is hydrogen peroxide good for?

A

being a molecule that is an oxidising agent

H Chemistry (8 decks)

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