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Chemistry > Electrolysis > Flashcards

Electrolysis Flashcards

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1
Q

Lead bromide is …. So must Be….

A

Insoluble

Molten

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2
Q

2 half equations of electrolysis of lead bromide

A

Pb2+ + 2e- -> pb

2br- -> br2 + 2e-

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3
Q

Cryolite is added to aluminium to

A

Lower the melting point

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4
Q

Products of electrolysis of aluminium

A

Liquid aluminium

Oxygen gas

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5
Q

Electrodes used in aluminium electrolysis?

Why must the be replaced

A

Carbon electrodes

React with oxygen and make carbon dioxide

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6
Q

Brine contains what ions

A

Na+
Cl-
H+
OH-

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7
Q

In electrolysis of brine water is formed at the positive electrode

A

Chlorine

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8
Q

In electrolysis what us firmed at negative ion and why

A

Hydrogen

Sodium is more reactive than hydrogen

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9
Q

Products of electrolysis of brine (3)

A

Hydrogen
Chlorine
Sodium hydroxide solution

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Chemistry (10 decks)

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