Accuracy and Precision Measuring tool: Burret Graduated Cylinder Volumetric Pipe

Question

Accuracy and Precision Measuring tool: Burret Graduated Cylinder Volumetric Pipet Mass of beaker __________ __________ __________ Mass after 1st addition of water __________ __________ __________ Mass after 2nd addition of water __________ __________ __________ Mass after 3rd addition of water __________ __________ __________ Mass of 1st 10.00 mL of water __________ __________ __________ Mass of 2nd 10.00 mL of water __________ __________ __________ Mass of 3rd 10.00 mL of water __________ __________ __________ Density of water __________ __________ __________ 1st Trial __________ __________ __________ 2nd Trial __________ __________ __________ 3rd __________ __________ __________ Average density __________ __________ __________ Deviations from average 1st Trial __________ __________ __________ 2nd Trial __________ __________ __________ 3rd __________ __________ __________ Average density __________ __________ __________ Temperature of water __________ _____

Explanation / Answer

Since the calculated density from burette is closest to the absolute density of water, burette is the most accurate tool.

S No. Measuring tool: Units Burette Graduated Cylinder Volumetric Pipet 1 Mass of beaker g 99.216 106.3726 113.147 2 Mass after 1st addition of water g 109.407 116.3957 123.095 3 Mass after 2nd addition of water g 119.241 126.3253 133.018 4 Mass after 3rd addition of water g 129.324 136.1869 142.947 5 Mass of 1st 10 mL g 10.191 10.0231 9.948 6 Mass of 2nd 10 mL g 9.834 9.9296 9.923 7 Mass of 3rd 10 mL g 10.083 9.8616 9.929 8 Density of water 1st Trial g/mL 1.0191 1.00231 0.9948 2nd Trial g/mL 0.9834 0.99296 0.9923 3rd Trial g/mL 1.0083 0.98616 0.9929 Average Density g/mL 1.0036 0.99381 0.9933 9 Deviations from average 1st Trial g/mL 0.0155 0.0085 0.0015 2nd Trial g/mL 0.0202 0.00085 0.0010 3rd Trial g/mL 0.0047 0.00765 0.0004 Average Deviation g/mL 0.01347 0.00567 0.00098 10 Temperature of water C 17 17 17 11 Absolute density of water g/mL 0.99877 0.99877 0.99877 12 % error of average density % 0.4836 0.4966 0.5443 13 Measuring tool most accurate - Burette

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