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Inorganic chemistry > Group 3 > Flashcards

Group 3 Flashcards

1
Q
  • Equation for sodium and water?
  • Alkali or acid?
  • pH?
A

2Na + 2H2O -> 2NaOH + H2
- alkali
- 13/14

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2
Q
  • Equation for magnesium and water?
  • Acid or alkali
  • pH?
A

Mg + 2H2O -> Mg(OH)2 + H2
- alkali
- 9/10

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3
Q

Why is Mg(OH)2 a weak alkali?

A

Its sparingly soluble

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4
Q
  • Equation for magnesium and steam?
A

Mg + H2O(g) -> MgO + H2

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5
Q
  • Equation for sodium and oxygen?
  • observations?
A

2Na + 1/2O2 -> Na2O
- yellow flame and white solid

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6
Q
  • Equation for magnesium and oxygen?
  • observations?
A

2Mg + O2 -> 2MgO
- bright white flame and white solid

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7
Q
  • Equation for aluminium and oxygen?
  • observations?
  • pH?
A

4Al + 3O2 -> 2Al2O3
- White flame and white solid
- 7

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8
Q
  • Equation for silicon and oxygen?
  • observations?
  • pH?
A

Si + O2 -> SiO2
- orange flame and white solid
- 7

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9
Q
  • Equation for phosphorus and oxygen?
  • Observations
A

P4 + 5O2 -> P4O10
- White flame and white fumes

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10
Q
  • Equation for sulphur and oxygen?
  • Observations
A

S + O2 -> SO2
- pale blue flame and colourless gas

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11
Q

Structure and bonding of sodium oxide?

A
  • Giant ionic lattice
  • Ionic bonds
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11
Q

Structure and bonding of magnesium oxide?

A
  • Giant ionic lattice
  • Ionic bonds
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12
Q

Structure and bonding of aluminium oxide?

A
  • Giant ionic lattice
  • Ionic bonds
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13
Q

Structure and bonding of silicon dioxide?

A
  • Macromolecular
  • Covalent bonds between atoms
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14
Q

Structure and bonding of phosphorus oxide?

A
  • Simple molecular
  • Induced dipole dipole between molecules
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15
Q

Structure and bonding of sulphur (VI) oxide?

A
  • Simple molecular
  • Induced dipole dipole between molecules
16
Q

Structure and bonding of sulphur (IV) oxide?

A
  • Simple molecular
  • Induced dipole dipole between molecules
17
Q
  • Equation for sodium oxide and water?
  • pH?
A

Na2O + H2O -> 2NaOH
13 - 14

18
Q
  • Equation for magnesium oxide and water?
  • pH?
A

MgO + H2O -> Mg(OH2)
9 - 10

19
Q

Explain why sodium oxide forms an alkaline solution when it reacts with water?

A
  • Sodium contains O2- ions
  • O2- ions reacting with water farming OH- ions
20
Q
  • Equation for aluminium oxide and water?
  • pH?
A
  • insoluble
  • 7
21
Q
  • Equation for silicon oxide and water?
  • pH?
A
  • insoluble
  • 7
22
Q
  • Equation for phosphorus oxide and water?
  • pH?
A

P4O10 + 6H2O -> 4H3PO4
1-2

23
Q
  • Equation for sulfur dioxide and water?
  • pH?
A

SO2 + H2O -> H2SO3
2-3

24
Q
  • Equation for sulfur trioxide and water?
  • pH?
A

SO3 + H2O -> H2SO4
0-1

25
Q

What is the acid/base nature of Al2O3?

A

amphoteric

26
Q

What is the acid/base nature of silicon dioxide?

Inorganic chemistry (2 decks)

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