The contact process Flashcards
1
Q
Temperature used
A
450*C
2
Q
Pressure used
A
1-2atm
3
Q
Catalyst used
A
Vanadium (V) Oxide V2O5
4
Q
How is sulphur dioxide made in the contact process
A
Burn Sulphur in air S+O2–>SO2
5
Q
How is sulphur trioxide make in the contact process
A
Reversible reaction
Forward is exothermic
2SO2+O2–>2SO3
6
Q
Why is it not good to react water with sulphur trioxide to make sulphuric acid
A
Produces an uncontrollable fog of concentrated sulphuric acid
7
Q
Making sulphuric acid in the contact process
A
Sulphur trioxide is absorbed in concentrated sulphuric acid
H2SO4+SO3–>H2S2O7 making fuming acid/oleum
Converts twice as much concentrated acid by adding water H2SO7+H20–>2H2SO4
8
Q
Uses for sulphuric acid
A
Fertilisers, Detergents, paints, extracting whit pigment from titanium ores
