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Chemistry A Level > 3.2.4 Period 3 > Flashcards

3.2.4 Period 3 Flashcards

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1
Q

How does sodium react with water? (4)

A

2Na + 2H2O > 2NaOH + H2
Vigorous reaction
Floats and moves on surface, forming silvery ball
Fizzing

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2
Q

How does magnesium react with water? (4)

A

Mg + 2H2O (l) > Mg(OH)2 + H2
Mg + H2O (g) > MgO + H2
Very slow reaction
Burns with white light, forming white solid with steam

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3
Q

Reactions with oxygen - sodium

A

Reaction - 4Na + O2 > 2Na2O
Speed - vigorous
Flame - yellow

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4
Q

Reactions with oxygen - magnesium

A

Reaction - 2Mg + O2 > 2MgO
Speed - vigorous
Flame - brilliant white

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5
Q

Reactions with oxygen - aluminium

A

Reaction - 4Al + 3O2 > 2Al2O3
Speed - slow
Flame - N/A

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6
Q

Reactions with oxygen - Silicon

A

Reaction - Si + O2 > SiO2
Speed - slow
Flame - N/A

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7
Q

Reactions with oxygen - phosphorous

A

Reaction - P4 + 5O2 > P4O10
Speed - spontaneously combusts
Flame - brilliant white

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8
Q

Reactions with oxygen - sulphur

A

Reaction - S + O2 > SO2
Speed - burns steadily
Flame - blue

(Forms SO3 under high temperatures and with a catalyst)

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9
Q

Reactions with water - sodium oxide

A

Reaction - Na2O + H2O > 2NaOH

pH - 12-14

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10
Q

Reactions with water - magnesium oxide

A

Reaction - MgO + H2O > Mg(OH)2

pH - 9-10

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11
Q

Reactions with water - aluminium oxide

A

Insoluble

Ionic and covalent character

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12
Q

Reactions with water - silicon dioxide

A

Insoluble

Macromolecular

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13
Q

Reactions with water - phosphorous oxide

A

Reaction - P4O10 + 6H2O > 4H3PO4
pH - 0-1
Acid formed - phosphoric acid

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14
Q

Reactions with water - sulphur dioxide

A

Reaction - SO2 + H2O > H2SO3
pH - 0-1
Acid formed - sulphurous acid (sulphuric (IV) acid)

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15
Q

Reactions with water - sulphur trioxide

A

Reaction - SO3 + H2O > H2SO4
pH - 0-1
Acid formed - sulphuric (VI) acid

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16
Q

Which period 3 oxides are basic?

A

Sodium oxide

Magnesium oxide

17
Q

Which period 3 oxides are acidic?

A

Silicon dioxide
Phosphorous oxide
Sulphur dioxide
Sulphur trioxide

18
Q

Which period 3 oxide is amphoteric?

A

Aluminium

Chemistry A Level (32 decks)

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