Group 3 Flashcards
- Equation for sodium and water?
- Alkali or acid?
- pH?
2Na + 2H2O -> 2NaOH + H2
- alkali
- 13/14
- Equation for magnesium and water?
- Acid or alkali
- pH?
Mg + 2H2O -> Mg(OH)2 + H2
- alkali
- 9/10
Why is Mg(OH)2 a weak alkali?
Its sparingly soluble
- Equation for magnesium and steam?
Mg + H2O(g) -> MgO + H2
- Equation for sodium and oxygen?
- observations?
2Na + 1/2O2 -> Na2O
- yellow flame and white solid
- Equation for magnesium and oxygen?
- observations?
2Mg + O2 -> 2MgO
- bright white flame and white solid
- Equation for aluminium and oxygen?
- observations?
- pH?
4Al + 3O2 -> 2Al2O3
- White flame and white solid
- 7
- Equation for silicon and oxygen?
- observations?
- pH?
Si + O2 -> SiO2
- orange flame and white solid
- 7
- Equation for phosphorus and oxygen?
- Observations
P4 + 5O2 -> P4O10
- White flame and white fumes
- Equation for sulphur and oxygen?
- Observations
S + O2 -> SO2
- pale blue flame and colourless gas
Structure and bonding of sodium oxide?
- Giant ionic lattice
- Ionic bonds
Structure and bonding of magnesium oxide?
- Giant ionic lattice
- Ionic bonds
Structure and bonding of aluminium oxide?
- Giant ionic lattice
- Ionic bonds
Structure and bonding of silicon dioxide?
- Macromolecular
- Covalent bonds between atoms
Structure and bonding of phosphorus oxide?
- Simple molecular
- Induced dipole dipole between molecules
Structure and bonding of sulphur (VI) oxide?
- Simple molecular
- Induced dipole dipole between molecules
Structure and bonding of sulphur (IV) oxide?
- Simple molecular
- Induced dipole dipole between molecules
- Equation for sodium oxide and water?
- pH?
Na2O + H2O -> 2NaOH
13 - 14
- Equation for magnesium oxide and water?
- pH?
MgO + H2O -> Mg(OH2)
9 - 10
Explain why sodium oxide forms an alkaline solution when it reacts with water?
- Sodium contains O2- ions
- O2- ions reacting with water farming OH- ions
- Equation for aluminium oxide and water?
- pH?
- insoluble
- 7
- Equation for silicon oxide and water?
- pH?
- insoluble
- 7
- Equation for phosphorus oxide and water?
- pH?
P4O10 + 6H2O -> 4H3PO4
1-2
- Equation for sulfur dioxide and water?
- pH?
SO2 + H2O -> H2SO3
2-3
- Equation for sulfur trioxide and water?
- pH?
SO3 + H2O -> H2SO4
0-1
What is the acid/base nature of Al2O3?
amphoteric
What is the acid/base nature of silicon dioxide?
acidic