Children's toys and jewelry were assessed for their contarmination by potentially toxic elements (PTE). This includes traces of As (74.92 g/mol), Cd (112.4 g/mol), Pb (207.2 g/mol), and Zn (65.39 g/mol) among others. The concentrations of these PTES were determined to characterize the subsequent health risks, and to possibly reinforce better legislation on the manufacturing of these products. A. If 365 ppb of Cd was observed, what is its equivalent in %(w/w)? B. A sample of plastic toy was treated resulting to a 1000 mL solution. What is the concentration of As in ppm if 65 ug of As is found in the sample? C. A 250 mLstock solution of 1.5 M Pb standard was prepared. What volume (in mL) of Pb stock solution must you use to prepare 50 mL of 0.15MP.

Children's toys and jewelry were assessed for their contarmination by potentially toxic elements (PTE). This includes traces of As (74.92 g/mol), Cd (112.4 g/mol), Pb (207.2 g/mol), and Zn (65.39 g/mol) among others. The concentrations of these PTES were determined to characterize the subsequent health risks, and to possibly reinforce better legislation on the manufacturing of these products. A. If 365 ppb of Cd was observed, what is its equivalent in %(w/w)? B. A sample of plastic toy was treated resulting to a 1000 mL solution. What is the concentration of As in ppm if 65 ug of As is found in the sample? C. A 250 mLstock solution of 1.5 M Pb standard was prepared. What volume (in mL) of Pb stock solution must you use to prepare 50 mL of 0.15MP.

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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