Question: how to calculate percentage error of volumetric flask?
Answer: Calculating maximum error This is usually marked on the glassware. We can express the maximum error as a percentage. Volumetric or standard flask (Class B) A 250 cm3 volumetric flask has a maximum error of 0.2 cm3 0.2 ÷ 250 = 0.0008 0.0008 x 100 = 0.08%.