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Problem: Consider the reaction:4 HCl(g) + O2(g) → 2 H2O(g) + 2 Cl2(g)Each molecular diagrams represents an initial mixture of the reactants.How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products?

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HCl is oxidized by O2 to produce water and Cl2. We have three different mixtures of reactants and we have to determine which mixture produces the greatest amount of Cl2 gas.


We will solve for the number of molecules of Cl2 from each reactant mixture and determine the limiting reactant in each case.


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Problem Details
Consider the reaction:

4 HCl(g) + O2(g) → 2 H2O(g) + 2 Cl2(g)

Each molecular diagrams represents an initial mixture of the reactants.

Three space-filling molecular diagrams labeled a, b, and c. Diagram a is a collection of seven molecules composed of a green and smaller white sphere combined, and one molecule composed of two red spheres combined. Diagram b is a collection of six molecules composed of a green and smaller white sphere combined, and three molecules composed of two red spheres combined. Diagram c is a collection of four molecules composed of a green and smaller white sphere combined, and five molecules composed of two red spheres combined.

How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products?

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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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Linder's class at Southwestern Oklahoma State University.