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<u>Stock Solutions</u>
<u>Stock Solutions</u>
# 0.2M Sodium Sulfate Solution
# 0.2M Sodium Sulfate Solution
## Andrew dissolved 22.034g of anhydrous Na<sub>2</sub>SO<sub>4</sub> in 1000mL of water
## Dr. Hartings dissolved 22.034g of anhydrous Na<sub>2</sub>SO<sub>4</sub> in 1000mL of water
## Andrew added 100mL of concentrated H<sub>2</sub>SO<sub>4</sub> to this solution
## Dr. Hartings added 100mL of concentrated H<sub>2</sub>SO<sub>4</sub> to this solution
## This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
## This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
# 1% wt. HCl Solution
# 1% wt. HCl Solution
## Andrew added 10mL of concentrated HCl to 985mL of water
## Dr. Hartings added 10mL of concentrated HCl to 985mL of water
## This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
## This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
# 0.2M Sodium Bicarbonate Solution
# 0.2M Sodium Bicarbonate Solution
## I dissolved 17.042g of NaHCO<sub>3</sub> in 1000mL of water
## Dr. Hartings dissolved 17.042g of NaHCO<sub>3</sub> in 1000mL of water
## This solution will be used to neutralize the acid in your films
## This solution will be used to neutralize the acid in your films


Revision as of 20:00, 1 September 2014

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Objective

Completing film synthesis, starting new film synthesis, and making stock Malachite green solutions.

Description

  1. Completing film synthesis
    1. Warm 150mL of Sodium Sulfate Solution (see below for details) at 80C for 15 minutes
    2. Place film in Sodium Sulfate Solution (see below for details) at 80C for 1 hour with gentle stirring
    3. Warm 150mL of 1% HCl at 80C for 15 minutes
    4. Place film in 1% HCl Solution (see below for details) at 80C for 30 minutes with gentle stirring
    5. Place film in Sodium Bicarbonate Solution for 15 minutes at room temperature with gentle stirring
  2. Starting new film synthesis
    1. Use Dr. Hartings' Wednesday's Procedure to make new 10% clay-polyvinyl alcohol film
      1. It was 10% by weight clay because we used 1g of PVA and 0.11g of clay

I prepared two new polymer films using the following quantities of reactants:

  • PVA weight-1.0029g (Polymer only)
  • PVA weight-1.0038g (Polymer and clay)
  • Na montmorillonite-0.1105g
  1. Malachite Green Solutions
    1. We need to make the following solutions
      1. 25mL 0.20ppm Malachite Green
      2. 25mL 0.50ppm Malachite Green
      3. 25mL 1.1ppm Malachite Green
      4. 25mL 1.4ppm Malachite Green
      5. 25mL 1.7ppm Malachite Green
      6. 50mL 2.0ppm Malachite Green
      7. 50mL 8.0ppm Malachite Green
      8. 50mL 80.0ppm Malachite Green
      9. 50mL 200.0ppm Malachite Green
        1. My group prepared the solutions for the 0.20ppm and 0.50ppm Malachite Green from a 200ppm stock solution. The rest of the solutions were prepared by other groups in the lab section.
    2. Take a UV-Visible spectrum of the 0.2ppm to 8ppm standards.
    3. Make a standard curve to determine the molar absorptivity of Malachite Green

Data

Stock Solutions

  1. 0.2M Sodium Sulfate Solution
    1. Dr. Hartings dissolved 22.034g of anhydrous Na2SO4 in 1000mL of water
    2. Dr. Hartings added 100mL of concentrated H2SO4 to this solution
    3. This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
  2. 1% wt. HCl Solution
    1. Dr. Hartings added 10mL of concentrated HCl to 985mL of water
    2. This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
  3. 0.2M Sodium Bicarbonate Solution
    1. Dr. Hartings dissolved 17.042g of NaHCO3 in 1000mL of water
    2. This solution will be used to neutralize the acid in your films

Notes

This area is for any observations or conclusions that you would like to note.


Use categories like tags. Change the "Course" category to the one corresponding to your course. The "Miscellaneous" tag can be used for particular experiments, as instructed by your professor. Please be sure to change or delete this tag as required so that the categories remain well organized.




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