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2.2SO2+O2->2SO3
3.SO3+H2O->H2SO4
4.3H2SO4+Al2O3->Al2(SO4)3+3H2O
5.Al2(SO4)3--H2O--->2Al(3+) + 3SO4(2-)
6.SO2+Na2O->Na2SO3
7.SO3+2KOH->K2SO4+H2O
8.H2SO4+Ca(OH)2->CaSO4+2H2O
9.Al2(SO4)3+2K3PO4->2AlPO4+3K2SO4
A=SO2
B=SO3
C=H2SO4
D=Al2(SO4)3
E=Al(3+)
F=SO4(2-)
G=Na2SO3
H=K2SO4
I=CaSO4
J=AlPO4