The nitrate in water was analyzed  using a spectrophotometric method. The absorbances of the standards and the unknown sample were obtained at 550 nm. Solution                    Absorbance 2.00 µM                          0.065 6.00 µM                          0.205 10.00 µM                       0.338 14.00 µM                       0.474 18.00 µM                       0.598 Unknown                       0.402  Write the equation of the line What is the standard deviation of the calibration curve?

Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions
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The nitrate in water was analyzed  using a spectrophotometric method. The absorbances of the standards and the unknown sample were obtained at 550 nm.

Solution                    Absorbance

2.00 µM                          0.065

6.00 µM                          0.205

10.00 µM                       0.338

14.00 µM                       0.474

18.00 µM                       0.598

Unknown                       0.402

 Write the equation of the line
What is the standard deviation of the calibration curve?

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