mass
amount
molar mass
concentration
solution volume
gas volume
molar gas volume
Avogadro
constant, L
number of
entities, N
N2.2 CALCULATING CONCENTRATION IN SIMPLE ACID-BASE TITRATIONS
Dealing successfully with problems of the type below generally assumes some experience in the practical aspects of titrimetry. Handling and manipulating apparatus like burettes, pipettes, volumetric flasks (aka titrimetric flasks), conical flasks (aka Erlenmeyer flasks), including the use of acid-base indicators, does help considerably in grasping the purpose of the analytical procedure.
Now attempt Q10. once again but where no guidance is provided. You might choose either to combine your answers as in (a) – (d) above, or use the consolidated approach illustrated towards the foot of the previous page.
The latter, if appropriate, has the advantage of the answer being obtained in a single calculation, albeit following a little bit of algebra. There is also no need to be concerned with converting units of volume. With more advanced work, however, the former approach, where amounts are calculated, is likely to prove the more efficient approach.
Such detailed guidance is not always a feature of such questions. For Q11.- Q16. which follow,
you have to proceed unaided, albeit with the worked example and Q10. to refer to for guidance.
Prior to attempting these, however, it ought to be beneficial to consider the relevant
stoichiometry bridge which provides a pictorial overview of the operations being attempted.