Răspuns:
-CALCULEZ masa de acid din solutie
c=mdx100/ms---> md= cxms/100= 40x400/100g= 160g H2SO4
--DIN ECUATIA REACTIEI calculez masa de sare,
1mol...............................1mol sau, in grame
H2SO4 + 2KOH----> K2SO4 + 2H2O
98g.................................174g
160g....................................x=m=160x174/98=........................calculeaza !!!!
Am utilizat: M,H2SO4=98g/mol si M,K2SO4= 174g/mol
Explicație: