-calculez masa de acid din solutia data
c/100= md/ms; 10/100= md/980---> md=98gH2SO4
M,H2SO4=98g/mol; M,BaSO4=233g/mol verifica !!!!!
H2SO4 +BaCl2 ---->BaSO4↓ +2HCl
98g...............................233g
98g..................................m=233g precipitat