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Chemistry > Chapter 5: Oxidation and Reduction > Flashcards

Chapter 5: Oxidation and Reduction Flashcards

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1
Q

Everyday examples of redox reactions

A

browning of apples, respiration and photosynthesis

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2
Q

Define oxidation in terms of electrons

A

Oxidation is the loss of electrons

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3
Q

Define reduction in terms of electrons

A

Reduction is the gain of electrons

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4
Q

Define oxidising agent

A

An oxidising agent is a substance that allows oxidation to happen by gaining electrons itself. An oxidising agent is always reduced.

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5
Q

Oxidising agents x4

A

Oxygen
Potassium manganate(VII)
HOCl
Hydrogen peroxide

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6
Q

Define reducing agent

A

A reducing agent is a substance that allows reduction to happen by losing electrons itself. A reducing agent is always oxidised

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7
Q

Reducing agents x4

A

Sulfur dioxide
Carbon
Carbon monoxide
Hydrogen

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8
Q

Oxygen use oxidation

A

Combustion, respiration

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9
Q

Potassium manganate(VII) use oxidation

A

Titrations, organic preparations

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10
Q

HOCl use oxidation

A

Kills microorganisms by oxidising them

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11
Q

Hydrogen peroxide use oxidation

A

Stain removal, bleaching of hair

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12
Q

Sulfur dioxide use reducing

A

Bleaching agent

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13
Q

Carbon and carbon monoxide use reducing

A

Production of metals from ore

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14
Q

Hydrogen use reducing

A

Reduction of organic compounds

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15
Q

Define oxidation number

A

The oxidation number of an atom is the charge that the atoms appears to have when the electrons are distributed according to certain rules

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16
Q

Define oxidation in terms of oxidation number

A

Oxidation is an increase in oxidation number

17
Q

Define reduction in terms of oxidation number

A

Reduction is a decrease in oxidation number

18
Q

Define electrolyte

A

An electrolyte is a substance that conducts electricity when dissolved in water or when molten

19
Q

Define electrolysis

A

Electrolysis is the breakup of a substance due to the passage of an electric current through it in aqueous solution or when molten

20
Q

Oxidation occurs at the …

A

Anode

21
Q

Reduction occurs at the …

A

Cathode

Chemistry (16 decks)

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