PERIOD 3 Flashcards
Why does SO3 have a higher melting point than SO2
•bigger molecule
•stinger van der waals between molecules
SO2 reacts with water to form ions
What are the ions?
H+
HSO3-
Why does SO2 form a weakly acidic solution?
Reaction is in equilibrium
Why is SiO2 described as acidic even though it is soluble in water
Reacts with bases
Why is white phorosphorus kept under water
To prevent it from reacting with oxygen
Why is P4O10 not presented as P2O5
P4O10 is it’s molecular formula
Why can magnesium oxide be used in excess when used for a neutralisation of phosphoric acid
Insoluble
Why can an excess of NaOH be dangerous
Can turn water alkaline
Two products of Cl and H2O
HClO
HCl
Flame colour for Na and oxygen
Orange
Flame colour for Mg and oxygen
White flame
Flame colour for aluminium and oxygen
White flame
Flame colour for Si and oxygen
Orange flame
Flame colour for white phosphorus and oxygen
White flame
Reaction of Al and O2
4Al + 3O2 —> 2Al2O3