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postlab 1 - Nick Frazier Quantitative analysis and Beer's...

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Nick Frazier Quantitative analysis and Beer’s law 1. The true molarity of our stock solution : Actual mass of CoSO4 = 5.622g CoSO4 V= 100 mL M= 1mol CoSO4 x 5.622 g x 1 mL = 0.2 M CoSO4 281.10g .01 L 2. Sample Dilution concentration 1 .16 M M1xV1=M2xV2 2 .12 M 0.2(20mL)=M2(25mL) 3 .08 M M2= .16 M 4 .04 M 3. Average Absorbance Stock 1.053 1 .872 2 .645 3 .431 4 .214 Unknown A .778 4. The significance of the slope of this line is it shows absorbance versus the concentration. Through this we can find the concentration of the unknown.

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5. The concentration of the unknown is approximately .145 M. I found this by using the plot
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postlab 1 - Nick Frazier Quantitative analysis and Beer's...

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