SOLUTION STOICHIOMETRY

– Previously, we dealt with comparing components of a chemical reaction by converting mass of substances to moles.

– Now we will consider solutions where we will need to convert volumes to moles to make comparisons.

GRAVIMETRIC ANALYSIS

Measure the concentration of solution by measuring the mass of a precipitate formed.

– Use grams of precipitate to find moles of solute.

– Divide by volume of solution to find concentration.

VOLUMETRIC ANALYSIS

Measure the concentration of solution by measuring the volume of solution need to find stoichiometric equivalence between reactants using a titration.

– Use volume of titrant to find moles of analyte.

– Divide moles of analyte by volume of analyte to find concentration.

– Acid/base reactions are commonly used but not always.

LIMITING REAGENT PROBLEMS

Recall the following about limiting reagent problems.

– To find limiting reactant, calculate number of moles of product formed from each number of moles of reactant.

– Limiting reactant will yield lowest number of moles produced.

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