1. One of the common fertilizer used to enrich soil with
phosphate is
superphosphate, CaH4(PO4)2. Typically, superphosphate is
produced by reacting some form of phosphate rock with sulfuric
acid. In one preparation, calcium phosphate is reacted with
sulfuric acid according to the reaction Ca3(PO4)2 +2H2SO4
CaH4(PO4)2 + 2CaSO4
20,000 kg/day of raw calcium phosphate containing 14wt% inert
impurities is reacted with 15,000 kg/day of 92wt% H2SO4 in water.
95% of the limiting reactant is converted. The molecular weight of...