lab 5 in lab

# lab 5 in lab - Part A Calibration Curve of FeSCN2 Solutions...

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Part A: Calibration Curve of FeSCN 2+ Solutions Data Table A. Calibration Curve of FeSCN 2+ Solutions Solution # Volume of 0.100 M Fe 3+ (mL) Volume of 5.00x10 -4 M SCN 1- (mL) Volume of water (mL) Total Volume (mL) [FeSCN 2+ ] (M) Absorbance at 477 nm Blank 1.00 0.00 5.00 6.00 ------- ------- 1A 1.00 1.00 4.00 6.00 8.33e-5 .005 2A 1.00 1.50 3.50 6.00 1.25e-4 .036

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3A 1.00 2.00 3.00 6.00 1.67e-4 .072 4A 1.00 2.50 2.50 6.00 2.08e-4 .105 5A 1.00 3.00 2.00 6.00 2.50e-4 .140 Equation of Trendline y = 592 x+ -.0227 R 2 = .953 Question 3a. In Part A, how does the intenstiy of the color of the solutions vary with the concentration of FeSCN 2+ in solution? as the [FeSCN 2+ ] decreases, the solution becomes more red as the [FeSCN 2+ ] increases, the solution becomes more red the color of the solutions do not vary with the [FeSCN 2+ ] the [FeSCN 2+ ] is the same for all the solutions so the intensity of the color doesn't change cannot tell from the information given
Question 3b. In Part A, how does the absorbance of the solutions vary with the concentration of

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lab 5 in lab - Part A Calibration Curve of FeSCN2 Solutions...

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