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Chemistry apparatus  

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Volumetric pipette (25cm 3): This was used because of its high degree of accuracy in quantitative analysis. It has an error of 0.06cm 3 if used correctly (i.e. if it is allowed to drain and retain the last drop). The percentage error = error x 100 = 0.06 x 100 Reading 25 =0.24% This is a relatively small percentage and ensures that the volume of solution measured is accurate to the highest degree. Volumetric flask (250cm 3): This is used to make standard solution of a particular volume. If a 250cm 3 volumetric flask is filled correctly i.e. the bottom of the meniscus rests on the calibration line, the error is 0.2cm 3. The percentage error = error x 100 = 0.2 x 100 Reading 250 =0.08% The percentage error is low and therefore the flask measures the volume to a high degree of accuracy. Burette: One drop from a burette has a volume of approximately 0.05cm 3. All...

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