Experiment 5 A student prepared a tea solution in 200 mL distilled water. A volume of 50 mL of the tea solution was diluted to 100 mL. The concentration of potassium ions in the solution was measured using flame photometry. The calibration curve of is shown below: 100 y = 1.7429x + 7.8929 R? = 0.9203 06 80 70 60 50 40 30 20 10 10 20 30 40 50 60 Concentration of Potassium (ppm) a) The instrument response was 75, calculate the concentration of potassium ions in the tea solution prepared. b) A senior scientist analysed the same sample and found different results. The calibration curve of the student was not reliable for this analysis. Suggest two major weakness of the student's calibration curve. Intstrument Response

Experiment 5 A student prepared a tea solution in 200 mL distilled water. A volume of 50 mL of the tea solution was diluted to 100 mL. The concentration of potassium ions in the solution was measured using flame photometry. The calibration curve of is shown below: 100 y = 1.7429x + 7.8929 R? = 0.9203 06 80 70 60 50 40 30 20 10 10 20 30 40 50 60 Concentration of Potassium (ppm) a) The instrument response was 75, calculate the concentration of potassium ions in the tea solution prepared. b) A senior scientist analysed the same sample and found different results. The calibration curve of the student was not reliable for this analysis. Suggest two major weakness of the student's calibration curve. Intstrument Response

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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