User:Andrew K Farag/Notebook/CHEM-581/2014/09/19

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Objective

  1. Start analysis on X-ray
  2. Start making new PVA and PVA clay films
  3. Set up experiments (like the malachite green experiments) to see how well the films absorb arsenic and mercury
    1. Notes: both of these are toxic metals, and we need to understand how to use/work with them.
      1. You MUST read the following before starting in lab today
      2. Information sheet on As
      3. Information sheet on Hg
      4. Note: Both metals are volatile. You MUST only work on solutions of these in the hood. If you take solutions of these out of the hood, they must be in sealed containers. Also, any container that has As or Hg in it must be rinsed (and the rinse must go into the waste containers).

Description

For Hg and As experiments, we made three different concentrations: 150ppm, 100ppm, and 50ppm; two sets of each for the PVA and PVA+Clay films.

Data

Mercury stock solution

  1. 0.0908g HgCl2
    1. (0.0908g HgCl2)*(1mol HgCl2/271.5g HgCl2)*(1mol HgCl2/1mol Hg)*(200.59g Hg/1mol Hg) = 0.0671g Hg
    2. put in 250mL volumetric
    3. 268ppm Hg



Table of Solution Preparation The stock solution for Arsenic was prepared by Eleni.

As Stock Solution 0.0499M
As stock solution 3738.61ppm
As 150ppm solution 4mL stock in 100mL
As 100ppm Solution 2.76mL stock in 100mL
As 50ppm solution 1.32mL stock in 100mL
Hg stock solution (ppm) 268
Hg 150ppm solution 13.99mL stock in 25mL
Hg 100ppm solution 9.32mL stock in 25mL
Hg 50ppm solution 4.66mL stock in 25mL
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