H2SO4

Pressure in Converter

1 atmosphere

Contact process Step 2

2SO2 (g) + O2 (g) <-> 2SO3 (g) AH = -197 KJ/mol

Oxidation (3Zn)

3Zn (s) + 4H2SO4 (aq) -> 3ZnSO4 (aq) + 4H2O (l) + S (s)

Temperature in Converter

400 - 500

Step 2 waste management

Double absorption - recycle SO2 to converter

Sulfuric Acid as an Acid (part b)

HSO4- (aq) + H2O (l) <-> SO42- (aq) + H3O+ (aq)

Oxidation (Zn) produce (H2)

Zn (s) + H2SO4 (aq) -> ZnSO4 (aq) + H2 (g)

Oxidation (4Zn)

4Zn (s) + 5H2SO4 (aq) -> 4ZnSO4 (aq) + 4H2O (l) + H2S (g)

Production of Superphosphate

Ca3(PO4)2 (s) + 2H2SO4 (l) + 4H2O (l) -> Ca(H2PO4)2 (s) + 2CaSO4.2H2O (s)

Contact Process Step 3 (Sulfuric Acid)

H2S2O7 (l) + H2O (l) -> 2H2SO4 (l)

Sulfuric Acid as an Acid (part a)

H2SO4 (l) + H2O (l) -> HSO4- (aq) + H3O+ (aq)

Contact process Step 1

S (l) + O2 (g) -> SO2 (g) AH = -297 KJ/mol

Contact Process Step 3 (Oleum)

SO3 (g) + H2SO4 (l) -> H2S2O7 (l)

Catalyst Equation

V2O5

Catalyst name

Vanadium (V) Oxide

Oxidation (Zn)

Zn (s) + 2H2SO4 (aq) -> ZnSO4 (aq) + 2H2O (l) + SO2 (g)