User:Elizabeth Ghias/Notebook/Experimental Chemistry/2012/10/15: Difference between revisions
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==Objective== | ==Objective== | ||
To remake the glutaraldehyde films containing clay, to make a film with porphyrin, and to measure sodium ion content using a sodium electrode. | |||
==Description== | ==Description== | ||
<u>Making Glutaraldehyde Films</u> | |||
* 4 films were made - (1)PVOH/glutaraldehyde, (2)PVOH/Na-MT/glutaraldehyde, (3)PVOH/100% CEC Clay/glutaraldehyde, and (4)PVOH/porphyrin/glutaraldehyde | |||
# Film 1 was made by dissolving 1 g PVOH in 7 mL of water. Once all the PVOH had dissolved, 1 mL of glutaraldehyde was added. The solution was stirred for 5 minutes and then was poured into a dish and allowed to evaporate until Wednesday. | |||
#* Actual amount of PVOH = 1.0059 g | |||
# Film 2 was made by dissolving 1 g PVOH and 0.1 g Na-MT in 7 mL of water. Once they had dissolved, 1 mL of glutaraldehyde was added. The solution was allowed to mix for 5 minuntes and then was poured into a dish and allowed to evaporate until Wednesday. | |||
#* Actual amount of PVOH = 1.0021 g, actual amount of Na-MT = 0.1016 g | |||
#Film 3 was made by dissolving 1 g PVOH and 0.1 g 100% CEC clay in 7 mL of water. Once they had dissolved, 1 mL of glutaraldehyde was added. The solution was allowed to stir for 5 minuntes and then was poured into a dish and allowed to evaporate until Wednesday. | |||
#* Actual amount of PVOH added = 1.0014 g, actual amount of 100% CEC clay = 0.1004 g. | |||
# Film 4 was made by dissolving 1 g PVOH in 7 mL of water. Once it dissolved, 1 mL of glutaraldehyde and 1 mL of porphyrin was added. The solution was allowed to mix for 5 minutes and then was poured into a dish and allowed to evaporate until Wednesday. | |||
<u>Determining the Sodium Ion Content</u> | |||
* The sodium ion content of the sodium standards ([]= 0.25,1,3,7,9 ppm) were measured | |||
# An 0.1 mL of ionic strength adjuster (4M solution containing NaOH) was added to a 3 mL of each solution to be tested, so that the pH of each solution would fall in the range of pH = 8 to 10. | |||
# The electrode was placed into each of the solutions and were allowed to equilibrate for 2 minutes. | |||
# This procedure was done for all of standards | |||
==Data== | ==Data== | ||
* | |||
<u>Sodium Electrode Results</u> | |||
{|style="width:400px" | |||
|<u>Sample</u> | |||
|<u>Negative Voltage (mV)</u> | |||
|- | |||
|Water + Adjuster | |||
|***** | |||
|- | |||
|0.25 ppm + Adjuster | |||
|175.1 | |||
|- | |||
|1 ppm + Adjuster | |||
|170 | |||
|- | |||
|3 ppm + Adjuster | |||
|158.5 | |||
|- | |||
|7 ppm + Adjuster | |||
|146.4 | |||
|- | |||
|9 ppm + Adjuster | |||
|139.8 | |||
|} | |||
*All of the voltage values should be negative. The table feature would not allow the negative signs to be included. | |||
==Notes== | ==Notes== | ||
* For an ion selective electrode, higher concentrations have more negative voltages. | |||
* The film containing the porphyrin had a light pink color to it. | |||
[[Category:Course]] | [[Category:Course]] |
Revision as of 13:49, 26 November 2012
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ObjectiveTo remake the glutaraldehyde films containing clay, to make a film with porphyrin, and to measure sodium ion content using a sodium electrode. DescriptionMaking Glutaraldehyde Films
DataSodium Electrode Results
Notes
|