Question

How many moles of H₂ can be theoretically produced from 5 mol of Fe and 6 mol of H₂O ? The chemical reaction is:

3Fe + 4H₂O -> Fe₃O_{4 +} 4H₂

How much of the initial products is left after reaction ?

Answer 1

3Fe + 4H₂O -> Fe₃O_{4 +} 4H₂

4 moles of H2O react with 3 moles of Fe

6 moles of H2O react with = 3*6/4   = 4.5 moles of Fe

Fe is excee reactant

the no of moles of Fe left after the reaction = 5-4.5 = 0.5 moles of Fe is left after the reaction

3Fe + 4H₂O -> Fe₃O_{4 +} 4H₂

3 moles of Fe react with 4 moles of H2O

5 moles of Fe react with = 4*5/3   = 6.66moles of H2O

H2O is limiting reactant

4 moles of H2O react with Fe to gives 4 moles of H2

6 moles of H2O react with Fe to gives = 4*6/4 = 6 moles of H2 >>>>answer