52 g xg
MgSO4 +BaCl2 =BaSO4 +MgCl2
208g 233g
MBaCl2=137 +2. 35,5=208 ------>1mol=208g
MBaSO4=137+32+4.16=233------>1mol=233g
se calculeaza md sol. de BaCl2
c=md.100: ms
md=c.ms: 100
md=20.260:100=52 g BaCl2
se afla x din ec.
x=52 .233 :208=58,25 g BaSO4