A series of standard calibration solutions were prepared in 100 mL volumetric flask by reacting standard solutions of phosphate with molybdenum(VI) and reducing the phosphomolybdic acid complex to produce the characteristic blue color. The concentration of stock solution was 100 mg/L. The absorbance, A were measured using colorimetric spectrometer as shown in the below table. A calibration curve was plotted against the concentration of phosphorous. Volume of Phosphorous from stock solution (mL) Concentration of Absorbance phosphorus (mg/L) 1 0.001 5 0.086 10 0.173 25 0.403 50 0.794 Unknown sample 0.201 1. Calculate the concentration of phosphorus prepared in the series of calibration curve. 2. Assuming a linear relationship between the variables, determine the linear least- squares equation and correlation coefficient. e

A series of standard calibration solutions were prepared in 100 mL volumetric flask by reacting standard solutions of phosphate with molybdenum(VI) and reducing the phosphomolybdic acid complex to produce the characteristic blue color. The concentration of stock solution was 100 mg/L. The absorbance, A were measured using colorimetric spectrometer as shown in the below table. A calibration curve was plotted against the concentration of phosphorous. Volume of Phosphorous from stock solution (mL) Concentration of Absorbance phosphorus (mg/L) 1 0.001 5 0.086 10 0.173 25 0.403 50 0.794 Unknown sample 0.201 1. Calculate the concentration of phosphorus prepared in the series of calibration curve. 2. Assuming a linear relationship between the variables, determine the linear least- squares equation and correlation coefficient. e

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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