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Chemistry 1 > Electrolysis > Flashcards

Electrolysis Flashcards

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1
Q

What is electrolysis?

A

Separation of ionic compounds using electricity

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2
Q

What is a Anode?

A

A Positive Electrode

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3
Q

What is a Cathode?

A

A Negative Electrode?

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4
Q

What is a electrolyte

A

Liquid that is a good conductor of electricity (has ions able to move freely)

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5
Q

Define Molten

A

Melted - In a liquid state

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6
Q

Define Redox

A

Reaction where reduction and oxidation take place

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7
Q

What is an Ore?

A

Rock containing metal or metal compounds

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8
Q

What is oxidation?

A

Gaining oxygen / Losing electrons

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9
Q

What is reduction?

A

Losing oxygen / Gaining electrons

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10
Q

What is a electrode?

A

Conducting rod made of metal or graphite (carbon) that carries the current in/out of the electrolyte.

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11
Q

Define Solution

A

An ionic solid dissolved in water

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12
Q

Metal (electrolysis)

A

Forms positive ions and is product formed at the negative electrode (cathode)

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13
Q

Non-Metal (Electrolysis)

A

Forms negative ions and is product formed at the positive electrode (anode) with the exception of H+ ions.

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14
Q

Define Solid ionic compounds

A

Ions are in a fixed position so are not free to move - cannot be separated by electrolysis.

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15
Q

Define Molten ionic substance

A

Ions are free to move so can be separated by electrolysis

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16
Q

Products of the electrolysis of molten sodium chloride

A

Sodium and chlorine

17
Q

Products of the electrolysis of molten lead bromide

A

Lead and bromine

18
Q

Products of electrolysis of molten aluminium oxide

A

Aluminium and oxygen

19
Q

Define Inert

A

Unreactive

20
Q

What does (aq) mean?

A

Aqueous solution

21
Q

What does (s) mean?

A

Solid

22
Q

What does (l) mean

A

Liquid

23
Q

Define Ion

A

The charged particle formed when an atom gains or loses electrons

24
Q

Describe and explain how the ions move during electrolysis

A

Positively charged ions move to the cathode (negative electrode), negatively charged ions move to the anode (positive electrode) as opposite charges attract.

25
Q

Why does water also get electrolysed?

A

Although water is a simple covalent molecule it can also dissociate into ions - H+ and OH- ions which can be electrolysed.

26
Q

What is the test for hydrogen gas?

A

Use a lit splint. Will give a squeaky pop if hydrogen is present.

27
Q

What is the test for oxygen gas?

A

Relights a glowing splint

28
Q

What is the test for chlorine gas

A

Use damp blue litmus paper. Will turn red then white.

Chemistry 1 (9 decks)

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