xg 255g
2Al + 3Cl2 =2AlCl3
2 .27g 2.133,5 g
MAlCl3=27+3.35,5=133,5 ------->1mol=133,5g
x=2.27 .255 : 2.133,5 =51,57 g Al [mp = masa de produs obt. practic ]
se calculeaza puritatea celor 60g Al
p=mp.100: mt
mp=p.mt :100
mp=90.60 :100=54 g Al pur [ mt=masa calculata teoretic ]
se aplica formula randamentului
randamentul= mp.100 : mt
=51,57 .100 : 54
=95,5 %