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AQA CHEMISTRY A LEVEL > 2.4 Period 3 oxides > Flashcards

2.4 Period 3 oxides Flashcards

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1
Q

How does sodium react with water?

A

Vigorously, with lots of effervescence

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2
Q

What is the formula for the Na + H₂O reaction?

A

2Na + 2H₂O = 2NaOH + H₂

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3
Q

How does magnesium react with water?

A

Very slowly, only really reacts with steam

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4
Q

What is the formula for the Mg + H₂O reaction?

A

Mg + 2H₂O = Mg(OH)₂ + H₂

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5
Q

What is the sodium oxide formula?

A

Na₂O

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6
Q

What is the magnesium oxide formula?

A

MgO

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7
Q

What is the aluminium oxide formula?

A

Al₂O₃

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8
Q

What is the silicon oxide formula?

A

SiO₂

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9
Q

What is the phosphorus oxide formula?

A

P₄O₁₀

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10
Q

What is the sulfur oxide formula?

A

SO₂ / SO₃

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11
Q

What is the trend in boiling point of oxides across period 3?

A
  • Na < Mg < Al oxides giant ionic bonding so high MP
  • SiO₂ is giant covalent, so high MP
  • P₄H₁₀ < SO₂ < SO₃, simple covalent, so lower MP
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12
Q

What does sodium oxide + water =

A

NaOH

  • Alkali
  • pH 14
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13
Q

What does magnesium oxide + water =

A

Mg(OH)₂

  • Alkali
  • pH 9
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14
Q

What does aluminium oxide + water =

A

INSOLUBLE

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15
Q

What does silicon dioxide + water =

A

INSOLUBLE

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16
Q

What does phosphorus oxide + water =

A

H₃PO₄

  • Acid
  • pH -1 - +1
17
Q

What does sulfur dioxide + water =

A

H₂SO₃

  • Acid
  • pH 2-3
18
Q

What does sulfur trioxide + water =

A

H₂SO₄

  • Acid
  • pH -1 - +1
19
Q

How does sodium oxide & magnesium oxide react with acid?

A

Form SALT and water (metal oxide + acid reaction)

20
Q

How does aluminium oxide react with acid?

A

Forms SALT and water

21
Q

How does aluminium oxide react with alkali?

A

Forms a hydroxide

22
Q

What is it called when an oxide reacts with both an alkali and an acid?

A

Amphoteric

23
Q

What is the only amphoteric oxide in period 3?

A

Aluminium oxide

24
Q

How does silicon dioxide react with acid?

A
  • Acts as a weak acid

Forms a SALT and water

25
Q

How does P₄H₁₀ react with alkali?

A

Phosphoric acid + Alkali = Na₃PO₄ + water

26
Q

How does SO₂/₃ react with alkali?

A

reacts with NaOH, to form NaHSO₃/₄

AQA CHEMISTRY A LEVEL (28 decks)

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