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AS Chemistry > Elements Of The Sea: Redox and electrolosysjs > Flashcards

Elements Of The Sea: Redox and electrolosysjs Flashcards

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1
Q

Definition of electrolysis

A

The use of electricity to break down molten or aqueous compounds into simpler substances

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2
Q

What is the name of the negative electrode

A

Cathode because it attracts cations

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3
Q

What is the name of the positive electrode

A

Anode because it attracts anions

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4
Q

What kind of reaction takes place at the cathode

A

Reduction

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5
Q

What kind of reaction takes place at the anode

A

Oxidation

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6
Q

What are the products of electrolysis of molten compounds

Eg. Lead bromide

A

Metal and non-metal

Eg. Lead and bromine

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7
Q

What is a solution

A

Compounds dissolved in water

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8
Q

Lean the tables for electrolysis of solutions ( what happens at the anode and what happens at the cathode )

A

Look at sheet

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9
Q

In electrolysis of sodium chloride (NaCl) what will you observe at the anode ( +ve electrode )

A

Bubbles of gas that bleach damp litmus paper

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10
Q

In electrolysis of sodium chloride (NaCl) what element is formed at the anode ( +ve electrode )

A

Chlorine

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11
Q

In electrolysis of sodium chloride (NaCl) what will you observe at the cathode ( -ve electrode )

A

Bubbles of gas

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12
Q

In electrolysis of sodium chloride (NaCl) what element is formed at the cathode ( -ve electrode )

A

Hydrogen

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13
Q

In electrolysis of copper sulphate (CuSO4 ) what will you observe at the anode ( +ve electrode )

A

Bubbles of gas which do not bleach damp litmus paper

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14
Q

In electrolysis of copper sulphate (CuSO4 ) what element is formed at the anode ( +ve electrode )

A

Oxygen

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15
Q

In electrolysis of copper sulphate (CuSO4 ) what will you observe at the cathode ( -ve electrode )

A

Brown coating on the electrode

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16
Q

In electrolysis of copper sulphate (CuSO4 ) what element is formed at the cathode ( -ve electrode )

A

Copper

AS Chemistry (43 decks)

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