Period 3 Flashcards by Ailbhe Sweeney | Brainscape

Q

Sodium reaction with water

A

2Na + 2H2O = 2NaOH + H2

Fizzing vigorously in cold water
Alkaline solution

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Q

Magnesium reaction with water

A

Mg + 2H2O = Mg(OH)2 + H2

Reacts slowly in cold water

Mg + H2O = MgO + H2

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Q

Reaction of sodium with oxygen

A

2Na + 1/2O2 = Na2O

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Q

Reaction of magnesium with oxygen

A

Mg + 1/2O2 = Na2O

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Q

Reaction of Aluminium with oxygen

A

2Al + 3/2 O2 = Al2O3

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Q

Reaction of silicon with oxygen

A

Si + O2 = SiO2

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Q

Reaction of phosphorus with oxygen

A

P4 + 5O2 = p4O10

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Q

Reaction of sulfur with oxygen

A

S + O2 = SO2

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Q

What colour is sodium when it burns

A

Yellow

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Q

What colour is magnesium when it burns

A

Brilliant white

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Q

What colour is phosphorus when it burns

A

Brilliant white

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Q

What colour is sulfur when it burns

A

Blue

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Q

Reaction of Na2O with water

A

Na2O + H2O = 2NaOH

pH 14

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Q

Reaction of MgO with water

A

MgO + H2O = Mg(OH)2

pH 9

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Q

Reaction of P4O10 with water

A

P4O10 +6H2O = 4H3PO4

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Q

Reaction of SO2 with Water

A

SO2 +H2O = H2SO3

Q

Reaction of SO3 with water

A

SO3 + H2O = H2SO4

Q

Define amphoteric

A

Something with the properties of an acid and a base

Q

Al2O3 reaction with sulfuric acid

A

Al2O3 + 3H2SO4 = Al2(SO4)3 + 3H2O

Q

Al2O3 reaction with sodium hydroxide

A

Al2O3 + 2NaOH + 3H2O = NaAl(OH)4

Product called Sodium Aluminate

Q

General equation for acids and bases

A

Acid + Base = salt + water