Question

Cat fier reactioneaza cu 300 g solutie acid clorhidric 30%? Ce cantitate si ce volum de gaz rezulta din reactie? Va rog frumos,multumeesc!

Answer 1

Fe+2HCl=FeCl₂+H₂

c=md*100/ms
⇒md=c*ms/100
md=30*300/100
md=90g HCl

Masa molara HCl=1+35.5=36.5g/mol
x=masa de Fe reactionata
x=90*56/2*36.5
x=69.04g Fe

gaz=H₂
y=mas de H₂ rezultata
y=90*2/2*36.5y=2.46g H₂
1mol.....................2g H₂
z moli...................2.46
z=2.46*1/2=1.23moli H₂

1mol...................22.4L
1.23 moli..................w
w=1.23*22.4/1=27.552L H₂