c/100= md/100
calculez masa de acid
9,8/100=md/200-----> md= 19,6gH2SO4
ecuatia reactiei
2mol 1mol
2NaOH + H2SO4-----> Na2SO4 + 2H2O
2x40g............98g
m.....................19,6g
m= 16gNaOH
calculez masa de solutie de baza,ms
10/100= 16/ms------------------------------------calculeaza ms !