1E 1E
2NaOH + H2SO4 ---> Na2SO4 +2H2O
IN REACTIE INTRA 1 echivalent baza si 1 echivalent acid
cV,acid=cV,baza---> cx50=0,2x30---> c, acid=0,12N
E,acid= M/2----> E= 98/2 g/echivalent gram
1000ml sol......0,12E........0,12x98/2g acid
1ml............................................T=.....................g/ml sol,acid