M+2HCl=MCl2+H2
1,625.............0,05g
x.....................2g
x=65 g deci metalul este Zn
b)1,625 g.......y
65...........2x36,5 g
y=1,825 g de HCl consumat in reactie
ms=1,825.100/30=6,083 g soluție de acid consumat
c)1,625..........z
65g...........136 g
z=3,4 g ZnCl2 rezultat
ms =3,4+10=13,4 g
c=3,4.100/13,4=25,36%