M(н)*w(Na2SO4)*M(BaSO4)/100*M(Na2SO4)+m(н)*w(K2SO4)*M(BaSO4)/100*M(K2SO4)=m(BaSO4)
m(н)*(w(Na2SO4)*M(BaSO4)/100*M(Na2SO4)+w(K2SO4)*M(BaSO4)/100*M(K2SO4))=m(BaSO4)
m(н)=m(BaSO4)/(w(Na2SO4)*M(BaSO4)/100*M(Na2SO4)+w(K2SO4)*M(BaSO4)/100*M(K2SO4)=0,2/(30*233,3906/100*142,0432+70*233,3906/100*174,2602)=0,1398 г