4 In the determination of sulphate ion concentration in natural water a turbidimeter was calibrated with a series of standard NazSO4 solutions. The following data were obtained in the calibration: Cx,mg SO4/L Turbidimeter reading, R 0.00 0.06 5.00 1.48 10.00 2.28 15.00 3.98 20.00 4.61 Assume that a linear relationship exists between the instrument reading and the concentration. a) Using a graph paper or Excel plot this data accurately b) Calculate the least-squares slope and intercept and write the equation of the line.

4 In the determination of sulphate ion concentration in natural water a turbidimeter was calibrated with a series of standard NazSO4 solutions. The following data were obtained in the calibration: Cx,mg SO4/L Turbidimeter reading, R 0.00 0.06 5.00 1.48 10.00 2.28 15.00 3.98 20.00 4.61 Assume that a linear relationship exists between the instrument reading and the concentration. a) Using a graph paper or Excel plot this data accurately b) Calculate the least-squares slope and intercept and write the equation of the line.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.10QAP

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