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Spectrophotometric Analysis of Fe2+ using 1,10-phenanthroline Given the following data, calculate the percent by mass Fe2+ in the...

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Chemistry

Spectrophotometric Analysis of Fe2+ using1,10-phenanthroline

Given the following data, calculate the percent by massFe2+ in the unknown sample. Assume the experimental dataprovided is obtained using the same procedure you will be using inthe lab.

Unknown sample mass = 0.1725

Absorbance (average) of unknown sample = 0.374

Beer’s Law Data:        Slope= 0.2203 L/mg Fe2+

                                   y-intercept = -0.001

**PREPARATION OF UNKNOWN FE2+ SAMPLE**

weighed 0.1725 g of the unknown sample into 100 mL beaker ->add about 30 mL of distilled water and 1 mL concentrated sulfuricacid -> transferred to 100 mL volumetric flask, then filled tomark with distilled water -> pipet 10.00 mL into second 100 mLvolumetric flask and make up to the mark -> then pipette 10.00mL into third 100 mL volumetric flask and add 10 mL saturatedsodium acetate and 10 mL 10% hydroxylamine hydrochloride -> add10 mL 0.1% 1,10-phenanthroline to the flask then fill to mark withdistilled water

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