User:Paul Rothenberg/Notebook/CHEM 571 Fall 2014/2014/08/26: Difference between revisions

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#Water was rinsed in "clean" glassware, and a UV-VIS was run to determine if the glassware was clean
#Water was rinsed in "clean" glassware, and a UV-VIS was run to determine if the glassware was clean
#DI,tap, and HPLC water was tested for conductivity and pH
#DI,tap, and HPLC water was tested for conductivity and pH
##<u>Conductivity</u>
##<u>Conductivity (μS/cm)</u>
###Tap - 494
###Tap - 494
###DI - 90.4
###DI - 90.4
###HPLC -  
###HPLC - 132
##<u>pH</u>
##<u>pH</u>
###Tap - 7.42
###Tap - 7.42

Revision as of 11:21, 27 August 2014

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Introduction to the Course

Being the first day of the course, we ran a few simple experiments and made a couple of simple solutions:

  1. A 100 mL solution of 1.71 mM NaCl in H2O
  2. 10 mL of 13.5 µM methylene blue dye from an 87 ppm stock

The experiments we ran were:

  1. Water densities versus temperature
    1. 10 1 mL samples of H2O were massed to determine the density at room temperature
  2. Water was rinsed in "clean" glassware, and a UV-VIS was run to determine if the glassware was clean
  3. DI,tap, and HPLC water was tested for conductivity and pH
    1. Conductivity (μS/cm)
      1. Tap - 494
      2. DI - 90.4
      3. HPLC - 132
    2. pH
      1. Tap - 7.42
      2. DI - 5.8
      3. HPLC - 6.03



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