User:Rachel Gill/Notebook/Chem 681 2018/2018/11/16

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Objective

Make more PVA/clay beads, make metal adsorption solutions, measure dye uptake in PVA beads.

Lab Protocol

Pb(C2H3O2) stock solution

  • 50 g x (25 micro g Pb/ 1 g total) x ( 1 g Pb/ 1E6 micro g Pb) x ( 379.33 g Pb(C2H3O2)/ 207.2 g Pb) = 0.0022884 g
  • 250 ppm needs 22.88 mg Pb(C2H3O2)
  • actual amount used 0.02336 g of Pb(C2H3O2), actual concentration 254.007 ppm

Pb(C2H3O2) tested concentrations

  • 10 ppm: needed 0.58824 g of 254.997 ppm, actual 0.58464 g, total solution 15.12195 g, actual concentration 9.86 ppm
  • 2.5 ppm: needed 0.14706 g of 254.997 ppm, actual 0.15422 g, total solution 15.14469 g, actual concentration 2.62 ppm
  • 5 ppm: needed 0.29412 g of 254.997 ppm, actual 0.28236 g, total solution 15.00823 g, actual concentration 4.8 ppm
  • 1 ppm: needed 0.05882 g of 254.997 ppm, actual 0.06576 g, total solution 15.05469 g, actual concentration 1.11 pm
  • 0.5 ppm: needed 0.02941 g of 254.997 ppm, actual 0.029893 g, total solution 15.15546 g, actual concentration 0.49 ppm

HgCl2 stock solution

  • 50 g x (250 micro g Hg/ 1 g total) x (1 g Hg/ 1E6 micro g Hg) x (271.5 g HgCl2/200.59 g Hg) = 0.01692 g
  • for 250 ppm needs 16.92 mg HgCl2
  • actual amount used 0.02243 g of HgCl2, actual concentration 330.97 ppm

HgCl2 tested concentrations

  • 10 ppm: needed 0.45321 g of 330.97 ppm, actual 0.46613 g, total solution 15.07932 g, actual concentration 10.23 ppm
  • 5 ppm: needed 0.22661 g of 330.97 ppm, actual 0.24053 g, total solution 15.09025 g, actual concentration 5.28 ppm
  • 2.5 ppm: needed 0.1153 g of 330.97 ppm, actual 0.12266 g, total solution 15.17696 g, actual concentration 2.67 ppm
  • 1 ppm: needed 0.04532 g of 330.97 ppm, actual 0.05150 g, total solution 15.06119 g, actual concentration 1.13 ppm
  • 0.5 ppm: needed 0.02266 g of 330.97 ppm, actual 0.02926 g, total solution 15.00501 g, actual concentration 0.65 ppm

Data

Notes