Question

In the equation

FeCl3+ O2 -->Fe2O3 +Cl2
if 6 moles of FeCl3 react with 3 moles of oxygen, what is the excess reactant?

Answer 1

FeCl₃ is present in excess.

Step-by-step explanation:

Given data:

Number of moles of FeCl₃ = 6 mol

Number of moles of oxygen = 3 mol

Excess reactant = ?

Solution:

Chemical equation:

4FeCl₃ + 3O₂ → 2Fe₂O₃ + 6Cl₂

Now we will compare the moles of reactant with product.

FeCl₃ : Fe₂O₃

4 : 2

6 : 2/4×6= 3

FeCl₃ : Cl₂

4 : 6

6 : 6/4×6= 9

O₂ : Fe₂O₃

3 : 2

O₂ : Cl₂

3 : 6

Less number of moles of product are formed by the oxygen thus it will act as limiting reactant while FeCl₃ is present in excess.