User:Melissa Novy/Notebook/CHEM-581/2012/11/16

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(Objectives)
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* Standardize 1 M NaHCO<sub>3</sub> solution.
* Standardize 1 M NaHCO<sub>3</sub> solution.
* Soak PVOH (MW 22000) in HPLC grade H<sub>2</sub>O to determine change in mass due to swelling.
* Soak PVOH (MW 22000) in HPLC grade H<sub>2</sub>O to determine change in mass due to swelling.
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* Soak PVOH (MW 22000), 1 mL glutaraldehyde, 1 mL porphyrin in 2 wt% H<sub>2</sub>SO<sub>4</sub>.
+
* Soak PVOH (MW 22000), 1 mL glutaraldehyde, 1 mL porphyrin in 2 wt% H<sub>2</sub>SO<sub>4</sub> until the film turns green.  Then soak the film in salt solution and take UV-vis of the film.
==Standardization of NaHCO<sub>3</sub>==
==Standardization of NaHCO<sub>3</sub>==

Revision as of 15:40, 16 November 2012

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Objectives

  • Standardize 1 M NaHCO3 solution.
  • Soak PVOH (MW 22000) in HPLC grade H2O to determine change in mass due to swelling.
  • Soak PVOH (MW 22000), 1 mL glutaraldehyde, 1 mL porphyrin in 2 wt% H2SO4 until the film turns green. Then soak the film in salt solution and take UV-vis of the film.

Standardization of NaHCO3

  • Protocol
    1. Weigh out 20 g of potassium hydrogen phthalate (KHP).
    2. The mass was divided into thirds, and then dried in the oven at 90°C for 48 hours.
    3. Each sample was divided in half again to give six samples of KHP total.
    4. One sample was placed in a 100 mL beaker and 2 drops of bromothymol blue was added.
    5. 1 M NaHCO3 was poured into a titration buret and the initial volume was recorded.
    6. The KHP was titrated with the NaHCO3 solution until the solution in the beaker turned blue and stopped fizzing.
    7. The process was repeated for two more KHP samples.
    8. The number of moles in the NaHCO3 solution was calculated.

CALCULATIONS




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