Relative error/uncertainty
Hi, just wondering is it possible to calculate the relative error/uncertainty in a titration experiment as the actual value of the volume isnt known?
Many thanks.
Many thanks.
Hi!
When discussing titration accuracy we should also take into account how precisely we can measure volume of the sample and volume of the titrant added. In most cases we will end titration somewhere between graduation marks. We can't estimate volume with better accuracy than about one fourth of the distance between graduation marks (HOWEVER IT MAY BE ONE GRADUATION DEPENDS ON TEACHER). That means 0.025 mL for a typical 50 mL burette. If we use 1 mL of the titrant, 0.025 mL means relative error of 2.5%. If we use 50 mL of the titrant, relative error goes down to 0.05%.
Hope this was helpful
More details: http://www.titrations.info/titrant-and-sample-volume
When discussing titration accuracy we should also take into account how precisely we can measure volume of the sample and volume of the titrant added. In most cases we will end titration somewhere between graduation marks. We can't estimate volume with better accuracy than about one fourth of the distance between graduation marks (HOWEVER IT MAY BE ONE GRADUATION DEPENDS ON TEACHER). That means 0.025 mL for a typical 50 mL burette. If we use 1 mL of the titrant, 0.025 mL means relative error of 2.5%. If we use 50 mL of the titrant, relative error goes down to 0.05%.
Hope this was helpful
More details: http://www.titrations.info/titrant-and-sample-volume
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