– 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.
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.
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.