22 - Period 3 Flashcards
Describe the reaction, including an equation, of sodium with water.
Fizzing
2Na + H2O –> NaOH + H2
Describe the reaction, including an equation, of magnesium with steam.
Mg + H2O –> MgO + H2
describe the reaction of sodium with oxygen.
Yellow flame
white solid (Na2O)
give the formula of sodium oxide.
Na2O
Which metals burn with a white flame in oxygen? What colour solids do they produce?
Mg, Al, Si, P
White
Describe the reaction of Sulfur with oxygen?
Blue flame
Acidic choking gas
Give the formula for oxide of silicon.
SiO2
GIve the formula for the oxide of Sulfur
SO2
GIve the formula for the oxide of Phosphorus
P4O10
Describe the trend in melting points of Period 3 oxides.
- SiO2 (macromolecular)
- al2O3 (ionic with covalent character)
- MgO (ionic)
- Na2O (ionic)
- P4O10 (simple molecular)
- SOr (simple molecular)
Give the reaction between metal solely ionic oxides and water?
Not Al2O3
Form alkaline hydroxides
Na2O + H2O –> NaOH (pH13)
MgO + H2O –> Mg(OH)2 (pH9)
Give the reaction between Al2O3 and SiO2 and water.
Do not dissolve in water (pH7)
Give an equation for the reaction between Phosphorus oxide and water.
P4O10 + 6H2O –> 4H3PO4 (pH0)
Give an equation for the reaction between Sulfur Dioxide and water.
SO2 + H2O –> H2SO3 (pH3)
Give an equation for the reaction between Sulfur Trioxide and water.
SO3 + H2O –> H2SO4 (pH0)
what do basic oxides react with acids to form?
salts + water
describe the reaction of alumminium oxide with bases and acids.
amphoteric - acts as base with acid, and acid with base
what do simple molecular acidic oxides react with bases to form?
salts + water
SiO2 (macromolecular) also forms Na2SiO3 with very concentrated NaOH
