Răspuns:
Explicație:
7moli AlCl3
react. cu CaSO4
g,moli produsi de reactie
7moli xmoli ymoli
2AlCl3 + 3CaSO4= Al2(SO4)3 + 3CaCl2
2moli 1mol 3moli
x= 7 : 2= 3,5moli Al2 (SO4)3
M= 2.27 + 3.32 + 12.16=342-----> 342g/moli
m= n . M
m= 3,5moli . 342g/moli=1197 g Al2 (SO4)3
y= 7 . 3 : 2= 10,5moli CaCl2
M= 40 + 2.35,5 =111------> 111g/moli
m= 10,5moli . 111g/moli =1165,5 g CaCL2