ro1 = ms1/Vs1 → ms1 = 400×1,22 = 488g NaOH
%C1 = md1/ms1×100 → md1 = C1×ms1/100 = 20×488/100 = 97,6g NaOH
%C2 = md2/ms2×100 => md2 = 15g NaOH
md final = md1+md2 = 97,6+15 = 112,6g
ms final = ms1+ms2 = 488+150 = 638g
%C final = mdf/msf×100 = 112,6/638×100 = Calculeaza !!