Stoichiometry Limiting Reagents. Stoichiometry If the quantity of each reactant is given, you must determine which one is used up first. This is the Limiting.

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Limiting & Excess Reactants with Stoichiometry

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Stoichiometry Limiting Reagents

Stoichiometry If the quantity of each reactant is given, you must determine which one is used up first. This is the Limiting Reagent The other reactant is not completely consumed in the reaction. It is in Excess.

Stoichiometry Like many problems in chemistry, there are multiple ways of solving these problems. You can save yourself some work, by first identifying what you need to solve for and then choosing the appropriate method. Don ’ t worry if you choose the wrong method, you ’ ll get to the correct answer, it will just take you a few more steps.

Stoichiometry Types of problems: 1. You want to know how much of the excess reactant remains. 2. You want to know how much product is formed

Stoichiometry CaCl 2 (aq) + 2 AgNO 3 (aq) Ca(NO 3 ) 2 (aq) + 2 AgCl (s) 65.35g g Determine which is the LR and how much of the excess reagent remains 1. Begin with either reactant; convert to moles; use your mole ratio to get to the other reactant; convert back to grams

Stoichiometry CaCl 2 (aq) + 2 AgNO 3 (aq) Ca(NO 3 ) 2 (aq) + 2 AgCl (s) 65.35g g

Stoichiometry CaCl 2 (aq) + 2 AgNO 3 (aq) Ca(NO 3 ) 2 (aq) + 2 AgCl (s) 65.35g g How much product can be formed? 1. Begin with either reactant; convert to moles; use the mole ratio to get to your product; convert back to grams 2. This must be done for each reactant 3. The reactant that produces the least amount of product is the LR

Stoichiometry CaCl 2 (aq) + 2 AgNO 3 (aq) Ca(NO 3 ) 2 (aq) + 2 AgCl (s) 65.35g g