User:Elizabeth Ghias/Notebook/Experimental Chemistry/2012/11/30: Difference between revisions
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==Objective== | ==Objective== | ||
To conduct the salt test on the porphyrin film. | To conduct the salt test on the porphyrin film, to take UV-Vis of the remaining solutions, and to measure the sodium content of the PVOH/glutaraldehyde film that was soaked in NaOH. | ||
==Description== | ==Description== | ||
* The acetone that the dye film was placed in was changed. | |||
<u>Porphyrin Salt Test</u> | <u>Porphyrin Salt Test</u> | ||
# The porphyrin film was removed from the 2% wt H<sub>2</sub>SO<sub>4</sub> and was placed in the sodium sulfate prepared last class. | # The porphyrin film was removed from the 2% wt H<sub>2</sub>SO<sub>4</sub> and was placed in 50 mL of the sodium sulfate prepared last class. | ||
# The time for the porphyrin film to change from green to pink was recorded. (took | # The time for the porphyrin film to change from green to pink was recorded. (took | ||
# The film was sliced to have the width of the UV-Vis cuvette. | # The film was sliced to have the width of the UV-Vis cuvette. | ||
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# The sliced film was placed in the cuvette and a UV-Vis spectra was taken. | # The sliced film was placed in the cuvette and a UV-Vis spectra was taken. | ||
# The sliced film was then placed into additional 2% wt H<sub>2</sub>SO<sub>4</sub> until it turned green. (Time to turn green = | # The sliced film was then placed into additional 2% wt H<sub>2</sub>SO<sub>4</sub> until it turned green. (Time to turn green = | ||
# Once the film slice had turned green, it was placed into the solution of aluminum sulfate prepared last class. | # Once the film slice had turned green, it was placed into 50 mL of the solution of aluminum sulfate prepared last class. | ||
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==Notes== | ==Notes== | ||
* start time for was 1:32 | * start time for soaking in sodium sulfate was 1:32 | ||
* The old acetone that the dye film was placed in (on Wednesday) was still clear in color. | |||
* The H<sub>2</sub>SO<sub>4</sub> solution that the porphyrin has been soaking in since Wednesday was green (when the film was removed from it) | |||
* At the end of 2 hours and 15 minutes, the porphyrin film was still green, so we left it to soak in the sodium sulfate solution over the weekend. UV-Vis will be taken on Monday. | |||
Revision as of 13:46, 30 November 2012
 Experimental Chemistry
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ObjectiveTo conduct the salt test on the porphyrin film, to take UV-Vis of the remaining solutions, and to measure the sodium content of the PVOH/glutaraldehyde film that was soaked in NaOH. Description
Data
Notes
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