To determine copper in a metallic alloy, 1.245 g of an alloy sample is dissolved in a 1: 2 mixture of acid. nitric and sulfuric acid. The dissolved product is made up to 250 mL with water (solution A). In a cell that is 1 cm thick, performs the measurement at the wavelength of maximum absorbance of a solution with a concentration of 750 ppm of copper, giving an absorbance of 0.505. What will be the percentage by weight of copper in the alloy if solution A gives us a reading of 16.8% transmittance in it? cell at the same wavelength?
To determine copper in a metallic alloy, 1.245 g of an alloy sample is dissolved in a 1: 2 mixture of acid. nitric and sulfuric acid. The dissolved product is made up to 250 mL with water (solution A). In a cell that is 1 cm thick, performs the measurement at the wavelength of maximum absorbance of a solution with a concentration of 750 ppm of copper, giving an absorbance of 0.505. What will be the percentage by weight of copper in the alloy if solution A gives us a reading of 16.8% transmittance in it? cell at the same wavelength?
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
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
Section4.9: Spectrophotometry
Problem 4.14CYU
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To determine copper in a metallic alloy, 1.245 g of an alloy sample is dissolved in a 1: 2 mixture of acid. nitric and sulfuric acid. The dissolved product is made up to 250 mL with water (solution A). In a cell that is 1 cm thick, performs the measurement at the wavelength of maximum absorbance of a solution with a concentration of 750 ppm of copper, giving an absorbance of 0.505. What will be the percentage by weight of copper in the alloy if solution A gives us a reading of 16.8% transmittance in it? cell at the same wavelength?
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