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Calculate the standard deviation value of precipitate weight

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Reference no: EM132131873

Q1: In your gravimatric analysis experiment, you weigh the precipitate of AgCl in a filtering crucible. You have to weight your filtering crucible first (three weighing measurement), then do the filtration. After drying the precipitate with the crucible, you weight the precipitate with filtering crucible together (three weighing measurement).

Suppose following are the weighing measurement results:

Weight of crucible (g): 15.7235, 15.7231, 15.7237

Weight of crucible + precipitate (g): 15.8426, 15.8430, 15.8427

Q: Calculate the standard deviation value of precipitate weight

Q2: Suppose you weight the three samples using exact mass weighing method. The sample weight is 0.2500 g. However, due to the existence of random error, your three samples's weights are actually: 0.2496 g, 0.2502 g, 0.2498 g

Q1: Calculate the standard deviation of chloride concentration of your measurement result

Q2: Calculate the relative standard deviation (RSD) of your chloride concentration measurement result.

Reference no: EM132131873

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