Răspuns:
C=mdx100/ms, unde ms=md+m,apa
md=25g
ms=25g+400g= 425g
c= 25x100/425=5,88%
c,m= niu/Vs
daca presupun : ro,sol=1g/mol---->Vs=425ml=0,425l
niu=md/miu=25/53,5mol=0,467mol
c,m= 0,467/0,425 mol/l=1,1mol/l
Explicație:
