Question

3Fe + 4H2O ‐----> Fe3O4 + 4H2

10 g of water vapour are passed on 16.8 g of iron which is heated till redness find the limiting reactant​

Answer 1

The limiting reactant​ : Fe

Further explanation

Reaction

3Fe + 4H₂O ⇒ Fe₃O₄ + 4H₂

mass of H₂O = 10 g

mol H₂O (MW=18 g/mol) :

`\tt mol=(mass)/(MW)\\\\mol=(10)/(18)=0.56`

mass of Fe = 16.8 g

mol Fe(MW=56 g/mol) :

`\tt mol=(16.8)/(56)=0.3`

Limiting reactant : the smallest ratio between mol : reaction coefficient

Fe :

`\tt (0.3)/(3)=0.1`

H₂O :

`\tt (0.56)/(4)=0.14`

Fe as limiting reactant