In water coagulation with alum (aluminum sulfate) and bicarbonate alkalinity, the
simplified reaction is: Al2(SO4)3
. 14 H2O + 6 HCO3 → 2Al(OH)3 ↓ 3SO4
-2 + 14 H2O +
6CO2, why does this reaction go to completion?
It goes to completion because an insoluble product is formed.