A 10000-lb batch of a 32.5 percent MgSO4 solution at 120ºF is cooled without appreciable evaporation to 70ºF. What weight of MgSO4-7H2O crystals will be formed (if it is assumed that the mother liquor...

A 10000-lb batch of a 32.5 percent MgSO4 solution at 120ºF is cooled without appreciable evaporation
to 70ºF. What weight of MgSO4-7H2O crystals will be formed (if it is assumed that the mother liquor
leaving is saturated)? Solubility of MgSO4-7H2O at 70ºF is 26.3 lb MgSO4 per 100 lb solution.
A. 2720 lb

B. 3900 lb
C. 3240 lb
D. 1890 lb

Ans: A