Water in the pipette will dilute the amount of unknown
solution. This means that we will need less base from the burette to react
with the acid in the unknown solution.
So a volume less than 33.45 mls will be required from the burette.
Water in the burette will dilute the amount of base of accurately
known concentration in the burette. This means that we will need more volume
of base from the burette to react with the acid in the unknown solution.
So a volume greater than 33.45 mls will be required from the burette.
The burette contains base that will react with the acid from the unknown solution. If acid is present in the burette it will react with the base and reduce the amount of base that is present to react with the acid. So we would need to add more volume of base from the burette to make up for this shortfall.
Water in the flask will have no effect on the volume of base
from the burette that is needed to react with the acid in the flask. The presence
of extra water makes no difference to the reaction between the two chemicals.
So a volume equal to 33.45 mls will be required from the burette.
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Titration-sources of error |
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