The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by NiCl2.6H2O to form a stable coordination compound. Assume that both the reactions are 100% complete. If 1584 g of ammonium sulphate and 952 g of NiCl2.6H2O are used in the preparation, the combined weight (in grams) of gypsum and the nickel-ammonia coordination compound thus produced is ____.
(Atomic weights in g mol–1: H = 1, N = 14, O = 16, S = 32, Cl = 35.5, Ca = 40, Ni = 59)
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NH4)2SO4 + Ca(OH)2 —→ 2NH3 + CaSO4.2H2O
12 mole excess
——————————→24 12
NiCl2.6H2O + 6NH3 —→ Ni(NH3)6Cl2 + 6H2O
4 mole 24 mole
– – 4 mole
wgypsum + wcomplex = 12(172) + 4(232) = 2992 grams