Analytical chemistry uses highly precise glassware, but the volumes indicated may not always be accurate. A common way to improve the uncertainty of an experiment is to calibrate volumes of glassware using a dense liquid and a high precision balance.

Two pipettes labelled as 10 mL pipettes dispense 9.890

±0.000 5 mL and 10.0

±0.05 mL respectively. Using these as examples explain the difference between accuracy and precision