C6 Electrolysis Flashcards

1
Q

what electrode is negative

A

cathode

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2
Q

what electrode is positive

A

anode

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3
Q

in electrolysis of an an aqueous solution what will form at the anode if the solution contains a halide

A

the halide

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4
Q

in electrolysis of an an aqueous solution what will form at the anode if the solution DOESNT contains a halide

A

oxygen

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5
Q

in electrolysis of an an aqueous solution what will form at the cathode if the solution contains a metal LESS reactive then hydrogen

A

the metal that’s less reactive then hydrogen (copper)

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6
Q

in electrolysis of an an aqueous solution what will form at the cathode if the solution contains a metal MORE reactive then hydrogen

A

hydrogen

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7
Q

what’s mixed with aluminium oxide during electrolysis to lower the melting point

A

cryolite

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8
Q

what occurs at the anode oxidation or reduction

A

oxidation- electrons are lost

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9
Q

what occurs at the cathode oxidation or reduction

A

reduction- electrons are gained

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10
Q

what’s the half equation at the cathode when hydrogen is produced

A

2H+ + 2e- -> H2

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11
Q

what’s the half equation at the anode when hydroxide ions are electrolysed

A

4 OH- —> 2 H2O + O2 + 4 e-

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