A STOCK SOLUTION containing 0.1581 g/L K2CrO4 was prepared. In order to make the CALIBRATION STANDARD, 5 ml of the STOCK was transferred into a 50ml volumetric flask and then diluted with an appropriate solvent. Calculate: (a) The ppm of K2CrO4 in the CALIBRATION STANDARD. (b) The molarity of K2CrO4 in the CALIBRATION STANDARD. (c) Calculate the molar absorptivity of K2CrO4 (at 371.0 nm). Assume that Beer's Law is obeyed over this concentration range. At 371.0 nm, this CALIBRATION STANDARD in a cell of path length 1.00 cm gave a %T of 59.752.

A STOCK SOLUTION containing 0.1581 g/L K2CrO4 was prepared. In order to make the CALIBRATION STANDARD, 5 ml of the STOCK was transferred into a 50ml volumetric flask and then diluted with an appropriate solvent. Calculate: (a) The ppm of K2CrO4 in the CALIBRATION STANDARD. (b) The molarity of K2CrO4 in the CALIBRATION STANDARD. (c) Calculate the molar absorptivity of K2CrO4 (at 371.0 nm). Assume that Beer's Law is obeyed over this concentration range. At 371.0 nm, this CALIBRATION STANDARD in a cell of path length 1.00 cm gave a %T of 59.752.

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

Chapter1: Basic Concepts Of Chemistry

Section: Chapter Questions

Problem 49RGQ: Fluoridation of city water supplies has been practiced in the United States for several decades. It...

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