Question

365 g solutie de Hcl de concentratie 10% reactioneaza cu m g de aluminiu. Ce valoare are m? cati moli de gaz se degaja?

Answer 1

3*36.5g 27g 1.5 moli
3HCl + Al -> AlCl3 + 3/2H2
36.5g m n

ms=365g
c=10%
md=c*ms/100=10*365/100=36,5g
MHCl=35.5+1=36.5g/mol
m=36.5*27/3*36.5g
m=9g Al
n=36,5*1.5/3*36.5=0.5moli gaz degajati