Edexcel IAL Chemistry AS 8.22 Volumetric uncertainty and technique
Edexcel IAL Chemistry AS 8.22 Volumetric uncertainty and technique
Account for both burette readings, divide absolute uncertainty by the measured quantity and link each rinsing, mixing or endpoint choice to moles or concentration.
How this is tested
- Calculate titre percentage uncertainty using two burette-reading uncertainties.
- Explain how rinsing and dilution affect delivered moles, concentration or titre.
- Improve endpoint accuracy with concordant runs, swirling and dropwise addition near the endpoint.