Answer to Question #262214 in Chemistry for jason

Question

(A)

A solid sample, containing the element copper, Cu, was quantitatively analysed

by atomic absorption spectroscopy using the following procedure: 0.5250 g of the sample were

dissolved in an appropriate solvent system which was then diluted to 50.0 cm3 5.0 cm3

of this solution were then diluted to 100.0 cm3This 100.0 cm3 of solution was then divided into 5 separate equal volume aliquots with each aliquot being placed in separate 50.0 cm3volumetric flasks. Various volumes of a standard stock solution of Cu (concentration = 250 ppm) were then added to these flasks and all the flasks were then diluted to volume after the additions. The resulting solutions were then analysed for Cu using an atomic

absorption spectrophotometer.

The following measurements were obtained:

Atomic Absorbance Volume of 250 ppm Cu added to flasks (cm3)

0.22 0.0

0.42 0.4

0.63 0.8

0.84 1.2

1.04 1.6

Use the data to calculate the % Cu in the original solid sample. (12 marks)

Answer 1

It's been a while since this question is posted here. Still, the answer hasn't been got. Consider converting this question to a fully qualified assignment, and we will try to assist. Please click the link below to proceed: Submit order