User:Keyun Wang/Notebook/Experimental Biological Chemistry I/2013/03/19

Experimental Biological Chemistry II

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Purpose Measure silver conductivity in solution with 50mL of pure water and clay+polymer film without the presence of silver Procedure Laponite Clay mixed in polymer made on 03/06/13 were taken out of mold. With scissors, three round shaped film were cut, with each weighing 0.5g, 0.5g, and 0.49g, respectively. In three 200mL polypropylene beakers, 50mL of pure water was poured in each beaker. One of each cut-out film was placed in each beaker. In another 200mL polypropylene beaker, 50mL of pure water was poured in. This functions as a negative control. In all four beakers, 1mL of 5M KNO3 was placed in each beaker as ionic silver adjustor. The conductivity of solution was taken for every 30 minutes for 2hours. One more measurement will be taken the next day after 24 hours. 10 weight percent silver to clay and polymer film was made. See Melissa's Notebook for detailed procedure regarding the making of film. Result Table below lists the measured silver conductivity in negative control, and the three beakers that include clay+polymer film.