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Chemistry Extension > Electrolytic Processes > Flashcards

Electrolytic Processes Flashcards

1
Q

When electrolysising molten substances there is only…..

A

The molten elements in question in the mixture

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2
Q

What are positive ions called

A

Cations

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3
Q

What are negative ions called

A

Anions

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4
Q

Where do anions go in electrolysis

A

To the anode

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5
Q

Where do cations go in electrolysis

A

Cathode

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6
Q

Positive ions go to the………

A

Negative anode

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7
Q

Negative ions go to the…..

A

Positive anode

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8
Q

What is oxidation….

A

Loss of electrons

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9
Q

What is reduction……

A

Gain of electrons

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10
Q

In a molten electrolysis of sodium chloride, what would go to the cathode and anode

A

Cathode - sodium

Anode - chloride

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11
Q

In the electrolysis of a solution, what is present

A

Hydrogen, oxygen and the elements in question

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12
Q

What is produced at the anode

A

The simplest ion is discharged

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13
Q

What is presented the cathode

A

A metal will be discarded if it’s less reactive than hydrogen
If it’s more reactive than hydrogen then hydrogen gas will be produced
Copper is less reactive
Sodium is more reactive

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14
Q

What is produced in copper chloride electrolysis

A

Cathode - copper

Anode - chlorine

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15
Q

What is produced in copper sulfate electrolysis

A

Cathode - copper

Anode - oxygen

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16
Q

What is produced In sodium sulfate electrolysis

A

Cathode - hydrogen

Anode - oxygen

17
Q

What is produced in sodium chloride electrolysis

A

Cathode - hydrogen

Anode - chlorine

18
Q

In purifying copper through electrolysis, what is the cathode made of

A

A thin pure piece of copper and more pure copper is added to it

19
Q

Why do we have to electrolyse copper

A

Because although copper is un reactive it isn’t found pure enough to be used in electrical conductors

20
Q

How is copper obtained from its ore

A

Reduction by carbon

21
Q

How does the electrical supply act in the electrolysis of copper

A

Pulls electrons off of copper atoms at the anode

Offering electrons at the cathode to nearby Cu2+ ions to turn them back into copper atoms

22
Q

What is at the cathode in electroplating

A

The object youre going to electroplate

23
Q

What is at the anode in electroplating

A

The bar of metal used for plating

24
Q

What is electroplating

A

Coating the surface of a metal with another metal using electricity

25
Q

What do we electroplate for everyday life

A

Decoration - jewellery or decorative items

Prevent corrosion - cutlery

26
Q

What conducts electricity in electrolysis

A

The free ions in the electrolyte

Chemistry Extension (5 decks)

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