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30 November, 15:16

A pipet is a type of glassware that is used to deliver a specified volume of liquid. A 5 mL pipette has major scale divisions marked for every milliliter and minor scale divisions marked for every 0.1 mL. What is the uncertainty (in mL) made using this pipet? Would it be proper to report that the pipet was used to deliver 3.2 mL of liquid? Explain why or why not

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  1. 30 November, 15:36
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    The uncertainty due to the equipment on chemistry equipment is equal to + -1/2 of the smallest unit marked in your equipment; in this case you have a pipette and its sameelst mark is 0.1 mL, so the uncertainty will be 0.05 mL. If you divide 0.05 mL / 3.2 mL and multiply it by 100 you get 1.56% of uncertainty if you measure 3.2 mL, so it will be proper to report the measurement and also the uncertainty.
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