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5.14.2012

5.14.2012. Chem IH Class Notes Limiting Reactant. Limiting Reactants. Stoichiometric Proportions: Limiting Reactant: Excess Reactant:. LR – How To. To find the Limiting reactant in a chemical reaction: Pick a reactant and assume it is the LR.

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5.14.2012

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  1. 5.14.2012 Chem IH Class Notes Limiting Reactant

  2. Limiting Reactants • Stoichiometric Proportions: • Limiting Reactant: • Excess Reactant:

  3. LR – How To To find the Limiting reactant in a chemical reaction: • Pick a reactant and assume it is the LR. • Calculate the amount of the other reactant needed to use up all of the LR. • Compare the amount needed to the amount available, for the second reactant. (given in the problem.) • If you have enough of it (more available than needed) then it is the XS reactant, and you guessed right: The first reactant is the LR • If you don’t have enough of it (more needed than you are given) then you guessed wrong: the second reactant is the LR and the first is in XS.

  4. 2 H2 + O2 2 H2O • Determine the LR of the reaction when given 1.22g O2 and 1.05g H2.

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