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Chemistry > Electroylsis - C6 > Flashcards

Electroylsis - C6 Flashcards

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1
Q

What is electrolysis

A

It is the breaking down of a compound using electrical energy

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2
Q

What is the name of the compound being broken down

A

electrolyte

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3
Q

What is the cathode

A

It is the negative electrode

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4
Q

What is the anode

A

It is the positive electrode

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5
Q

What is the name of the positive ion

A

the cation

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6
Q

What is the name of the negative ion

A

Anion

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7
Q

What does PANIC stand for

A 
Positive
Anode
Negative 
Is
Cathode
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8
Q

What state does the electrolyte have to be in

A

Molten or in solution

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9
Q

How is electrolysis used in industry

A

It is used to extract useful elements from their ores

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10
Q

What does OILRIG stand for

A 
Oxidation
Is 
Loss
Reduction
Is
Gain
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11
Q

What type of ion forms at the cathode when the electrolyte is molten

A

positive metal ion

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12
Q

What type of ion forms at the anode when the electrolyte is molten

A

Negative non-metal ion

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13
Q

What is the test for chlorine

A

Chlorine bleaches damp blue litmus paper, it goes red first

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14
Q

What is the test for oxygen

A

Relighting a burning splint

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15
Q

What is the test for hydrogen

A

Squeaky pop test

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16
Q

What is alumina

A

Aluminium oxide

17
Q

How is aluminium extracted

A

Electrolysis

18
Q

What is the name of the ore that alumina is taken from

A

Bauxite

19
Q

Why is alumina dissolved in cryolite

A

So it conducts electricity and lowers the melting point

20
Q

What are the uses of aluminium

A

Cans
Air plane chassis
Cooking foil

21
Q

What ions are always formed when the electrolyte is a solution

A

H+ and OH-

22
Q

What is the rule at the cathode when the electrolyte is a solution

A

If the metal ion in solution is less reactive than hydrogen, the metal will form

But if the metal ion is more reactive than hydrogen, the hydrogen will be formed

23
Q

What is the rule at the anode when the electrolyte is a solution

A

If a halide ion (Group 7) is present, the halogen is formed

But if there is no halide ion present, the hydroxide ion is discharged and oxygen is formed

Chemistry (12 decks)

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