How to Understand the Stoichiometric Relationship on a Particulate Diagram - Part 1

Stoichiometry is the relationship between the quantities of reactants and products before, during, and after chemical reactions.


A chemical equation is the representation of a chemical reaction in the form of symbols and chemical formulas. The coefficients next to the symbols and formulas of entities are the absolute values of the stoichiometric numbers.

The limiting reagent (aka limiting reactant/agent) in a chemical reaction is a reactant totally consumed when the chemical reaction is completed.

Checking the limiting reactant (LR): To take the number of moles of each reactant and divide it by its stoichiometric coefficient in the balanced equation. The quotient with a lower value indicates the LR.

Question:

Which of the following particulate diagrams/views best represents the reaction of CO with O2 to form CO2?



Click/tap to enlarge the image

Solution:



Click/tap to enlarge the image

Storming stoichiometry❓ Let Chemaficionado know in the comments below or at mychemistryhomework@gmail.com❗

References:

(1)    Limiting reagent. Wikipedia. https://en.wikipedia.org/wiki/Limiting_reagent.

‌(2)    Brown, C.; Ford, M. Higher Level Chemistry, 2nd ed.; Pearson Education: Harlow, Essex, 2014.

‌(3)    Jespersen, N. D.; Barron's Educational Series, Inc. Barron’s AP Chemistry; Barron’s Educational Series: Hauppauge, N.Y., 2012.

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