Question

How many grams of K₂CrO₄ will I get if I react 75g FeCr₂O₄?

FeCr₂O₄ + K₂CO₃ + O₂ --> K₂CrO₄ + Fe₂O₃ + CO₂

Answer 1

The balanced equation is

4FeCr₂O₄ + 8K₂CO₃ + 7O₂ --> 8K₂CrO₄ + 2Fe₂O₃ + 8CO₂

$m(K_2CrO_4)=75g(FeCr_2O_4)\times\frac{1mol(FeCr_2O_4)}{223.83g(FeCr_2O_4)}\times\frac{8mol(K_2CrO_4)}{4mol(FeCr_2O_4)}\times\frac{194.19g(K_2CrO_4)}{1mol(K_2CrO_4)}=130g$

Answer: 130 g