se transfera cate 3 moli de aluminiu cu acid clorhidric si acid sulfuric. Ce cantitati de acizi se folosesc si cate g de saruri de aluminiu se formeaza?
Răspunsuri la întrebare
3 moli xmoli ymoli
2Al + 6HCl = 2AlCl3 +3H2
2moli 6moli 2moli
Se lucreaza in moli
x=3.6:2=9 moli HCl
MHCl=1+ 35,5=36,5------>1mol=36,5 g
1mol HCl--------------36,5 g HCl
9 moli---------------xg HCl
x=9.36,5=328,5 g HCl
Urmeaza sa se calc. cantit. de sare formata ( y )
y=3.2:2=3 moli AlCl3
MAlCl3=27+3.35,5=133,5----->1mol=133,5g
133,5 g AlCl3-------------1mol
y g---------------------------3moli AlCl3
y=133,5.3=400,5 g AlCl3
Acum se lucreaza pe a doua ecuatie
3moli x1moli y1 moli
2 Al +3 H2SO4 =Al2 (SO4)3 + 3H2
2moli 3moli 1mol
x1=3.3:2=4,5 moli H2SO4
MH2SO4=2+32+4.16= 98------>1mol=98g
1mol H2SO4------------98g
4,5 moli-----------------x
x=4,5.98=441g H2SO4
y1=3.1:2=1,5 moli Al2(SO4)3
MAl2(SO4)3=2.27+3.32 +12.16=342------->1mol=342g
1mol -------------342g
1.5 moli----------y
y=1,5.342=513 g Al2(SO4)3