Question

The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by $NiC{l}_2.6H_{2}O$ to form a stable coordination compound. Assume that both the reactions are $100\%$ complete. If $1584g$ of ammonium sulphate and $952g$ of $NiC{l}_2.6H_{2}O$ 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)

Answer 1

Answer: 2992

$\underset{952g=4mol}{NiC{l}_2.6H_{2}O}+\underset{24mol}{6N{H}_3}\to \underset{(M=232)4mol}{[Ni(N{H}_3{)}_6]C{l}_2}+6H_{2}O$
Total mass $=12\times 172+4\times 232=2992g$