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Chemistry, 18.01.2020 02:31 valeriegarcia12
Astudent performed an analysis of a sample for its calcium content and obtained the following results:
14.92 g, 14.91 g, 14.88 g, 14.92 g
the actual amount of calcium in the sample is 20.90 g. for this lab, the instructor asked students to obtain results within 5% error and rsd and to redo the experiment if that was not achieved.
(a) report the student’s results for the average and the standard deviation of the measured masses. show your calculations below. do the calculations by hand, and if you have a calculator or excel you can use it to check your answer.
. ± .
(average) (standard deviation)
b) calculate the percent error, using the average mass, for this student’s experiment.
(c) calculate the relative standard deviation for this student’s experiment.
(d) briefly comment on the accuracy vs. the precision obtained by the student. does the student need to redo the experiment?
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Answers: 3
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Astudent performed an analysis of a sample for its calcium content and obtained the following result...
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