Question: A forensic chemist is preparing a standard sample of AsCl3 for use in a quantitative assay. The arsenic trichloride was purchased from Sigma Aldrich and

A forensic chemist is preparing a standard sample of AsCl3 for use in a quantitative assay. The arsenic trichloride was purchased from Sigma Aldrich and is listed as having a molar mass of 181.28 g/mol. The chemist measures out 3.229 grams of AsCl3 on a balance with an accuracy of +/- 0.003g. The sample was then transferred to a 150.00 mL volumetric flask with an accuracy of +/- 0.05 mL. (a) What is the molarity of the solution made, including the error values? (b) The chemist then took 25.0 mL of the solution out using a pipet with +/- 0.05 mL and transferred it to a new 250.00 mL volumetric with +/- 0.02 mL. What is the new concentration with error?

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