Standard solutions of Erythrosin B (A red food dye) are prepared by pipetting 1.00, 2.00, 5.00, 7.00, 10.00 mL of 1.108x10- 2 mol/L Erythrosin B solution into 50.00 mL volumetric flasks. The 5 standards are then run on a Spectronic 20 at Amax Complete the table below and graph the calibration curve. [Erythrosin B] (mol/L) Volume Erythrosin B (mL) 1.00 2.00 5.00 7.00 10.00 Equation of trendline: R². Absorbance 0.160 0.211 0.342 0.450 0.571

Standard solutions of Erythrosin B (A red food dye) are prepared by pipetting 1.00, 2.00, 5.00, 7.00, 10.00 mL of 1.108x10- 2 mol/L Erythrosin B solution into 50.00 mL volumetric flasks. The 5 standards are then run on a Spectronic 20 at Amax Complete the table below and graph the calibration curve. [Erythrosin B] (mol/L) Volume Erythrosin B (mL) 1.00 2.00 5.00 7.00 10.00 Equation of trendline: R². Absorbance 0.160 0.211 0.342 0.450 0.571

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Please help.

Standard solutions of Erythrosin B (A red food dye) are prepared by pipetting
1.00, 2.00, 5.00, 7.00, 10.00 mL of 1.108x10- 2 mol/L Erythrosin B solution into
50.00 mL volumetric flasks. The 5 standards are then run on a Spectronic 20 at
Amax
Complete the table below and graph the calibration curve.
[Erythrosin B] (mol/L)
Volume Erythrosin B
(mL)
1.00
2.00
5.00
7.00
10.00
Equation of trendline:
R²:
Absorbance
0.160
0.211
0.342
0.450
0.571

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Solution 1 Solution 2 Solution 3 Solution 4 Solution 5 Concentration iron(III) nitrate 0.00200 0.00200 0.00200 0.00200 0.00200 [Fe(NO3)3] (M) Concentration potassium thiocyanate 0.00200 0.00200 0.00200 0.00200 0.00200 [KSCN] (M) Volume Fe(NO3)3 (mL) 5.00 5.00 5.00 5.00 5.00 Volume KSCN (mL) 5.00 4.00 3.00 2.00 1.00 Volume DI water (mL) 0.00 1.00 2.00 3.00 4.00 Initial concentration [Fe3+] (M) 0.00100 0.00100 0.00100 0.00100 0.00100 Initial concentration [SCN‍] (M) 0.00100 0.000800 0.000600 0.000400 0.000200 Absorbance 0.269 0.192 0.154 0.104 0.052 Equilibrium [FeSCN2+] (M) 0.000198 0.000141 0.000113 0.0000765 0.000038 Equilibrium constant Kc Average Kc
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