We´re asked to calculate the mass of NH3 produced from 35.0 g of N2 and 11.6 g of H2, and determine which is the excess reactant and the amount of it after completing the reaction.
Consider that the limiting reactant is the one that’s consumed completely in the reaction and forms the less amount of product, and the excess reactant is the one that remains after the reaction is completed and forms the most amount of product.
The problem can be solved in 6 steps:
Step 1: Calculate the Molar Mass (MM) of N2, H2, and NH3.
Step 2: Calculate the moles of N2 and H2
Ammonia is produced by the reaction of nitrogen according to the equation.
N2(g) + 3H2(g) → 2NH3(g)
(A) Calculate the mass of ammonia produced when 35.0 g of nitrogen react with 11.6 g of hydrogen. (g)
(B) Which is the excess reactant and how much of it will be left over when the reaction is complete?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Limiting Reagent concept. If you need more Limiting Reagent practice, you can also practice Limiting Reagent practice problems.