Determination of the concentration of Zn(II) in a sample of river water was carried out by the standard addition method. A standard solution of 20 ppm Zn(II) was prepared and added to the filtered river water sample. The prepared series of solutions were then measured for absorbance with AAS and the results were as follows: 1. Fe(lII) 20 ppm (ml) | Sample (ml) 0,0 H2O (ml) A 0.111 1 9. 0,2 1 8 0.167 0,4 1 7 0.223 0,6 1 6 0.286 0,8 1,0 1 5 0.347 1 4 0.401 a. Draw a calibration curve for the volume of Zn(1I) vs. absorbance and concentration i Zn(11) vs. absorbance b. Based on the available data, what is the concentration of Zn(lI) in the sample

Determination of the concentration of Zn(II) in a sample of river water was carried out by the standard addition method. A standard solution of 20 ppm Zn(II) was prepared and added to the filtered river water sample. The prepared series of solutions were then measured for absorbance with AAS and the results were as follows: 1. Fe(lII) 20 ppm (ml) | Sample (ml) 0,0 H2O (ml) A 0.111 1 9. 0,2 1 8 0.167 0,4 1 7 0.223 0,6 1 6 0.286 0,8 1,0 1 5 0.347 1 4 0.401 a. Draw a calibration curve for the volume of Zn(1I) vs. absorbance and concentration i Zn(11) vs. absorbance b. Based on the available data, what is the concentration of Zn(lI) in the sample

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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Question

Determination of the concentration of Zn(II) in a sample of river water was carried out by the standard
addition method. A standard solution of 20 ppm Zn(II) was prepared and added to the filtered river water
sample. The prepared series of solutions were then measured for absorbance with AAS and the results
were as follows:
1.
Fe(lII) 20 ppm (ml) Sample (ml)
H2O (ml)
A
0,0
1
0.111
0,2
1
8
0.167
0,4
7
0.223
0,6
1
6.
0.286
0,8
1
0.347
1,0
1
0.401
a. Draw a calibration curve for the volume of Zn(II) vs. absorbance and concentration Zn(II) vs.
absorbance
b. Based on the available data, what is the concentration of Zn(II) in the sample

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