mass
amount
molar mass
concentration
solution volume
gas volume
molar gas volume
Avogadro
constant, L
number of
entities, N
N2.4 UNSTRUCTURED STOICHIOMETRY PROBLEMS FOR SIMPLE ACID-BASE TITRATIONS
The stoichiometric equation for the reaction in solution is not always provided if it
happens to be one that a candidate should be expected to know or deduce readily.
In the three problems that follow, Q12.- Q14., you are required to calculate the volume
of a reacting solution required rather than its concentration.
It has probably become obvious that patterns exist for the various combinations of stoichiometric coefficients, n, required for equations where simple inorganic alkalis/bases
and acids neutralize one another. A matrix might make it easier for you to spot these.
Problems involving concentration are not restricted to solution-solution situations as we see in the next exercises. The concentration of one substance may need to be related to the mass of another, or perhaps the volume of a gas. But once again, generating and using the correct stoichiometric factor are key parts of the procedure.