Răspuns:
Explicație:
-se afla metalul
1,625g 0,05g
M + 2HCl = MCl 2 + H2
A 2g
A . 0,05 = 1,625 . 2
A . 0,05 = 3,25
A=3,25 : 0,05= 65--------> AZn
-se afla masa de HCl
1,625g xg yg
Zn + 2HCl = ZnCl2 + H2
65g 2.36,5g 136
x=1,625 .73 : 65= 1,825g HCl --------> md sol. de HCl
-se afla ms sol. de HCl
ms=md.100: c
ms= 1,825 .100 : 30=6,08g sol. HCl
-se afla masa ZnCl2
y=1,625. 136 : 65=3,4 g ZnCl2------md
ms=md + mapa
ms=3,4 + 10=13,4g
-se afla c
c=md.100 : ms
c=3,4 .100 : 13,4=25,37%
MZnCl2= 65+2.36,5=136------>136g/moli
MHCl=1+ 35,5=36,5------>36,5g/moli