CHEM 1211 Section 7.4 (Limiting Reactants and Percent Yield)

run out

In most reactions, one reactant will ___ ___ before the others.

Limiting Reactant (Limiting Reagent)

the reactant that runs out first

Excess Reactant (Excess Reagent)

the reactant that doesn’t run out first

Theoretical Yield

The ideal amount of product that a reaction can make mathematically

Actual Yield

The amount the reaction produces in the laboratory

Percent Yield

The ratio of actual yield to percent yield

3.345 mol CO₂

If you start with 6.71  mol O₂, how many moles of CO₂ will be produced?  

6.71 mol CO₂

If you start with 6.71 mol CH₄, how many moles of CO₂ will be produced?

ratio

To determine the amount of moles produced in a reaction, determine the _____ between the reactants and the product.

O₂

__ is the limiting reactant because it produces half as many moles as CO₂.

Reactant

a substance that is consumed in a reaction

Reagent

any substance mixed during a reaction, including catalysts, solvent and unconsumed indicators