User:Keyun Wang/Notebook/Experimental Biological Chemistry I/2013/01/29

Experimental Biochemistry II

Main project page Previous entry      Next entry

Purpose Start making sample Silver film with proposed protocol Procedure 2.87g of AgNO3 was weighted out and placed in a 50mL Erylenmeyer flask. 0.3g of Laponite clay was weighted out and placed in same Erlenmeyer flask as above. The 2.87g of AgNO3 was calculated in the following ways: Cationic exchange capacity of Laponite: 0.55 milliequivilient/gram Weight % of silver to be exchanged in Clay: 95% Calculation is shown as follows: 0.3 g LMT × (55 meqv/100 g LMT) × (1 mol Ag+/1000 meqv) × (107.86 g Ag+/1 mol Ag+) × (1 mol Ag+/1 mol AgNO3) × (1 mol AgNO3/169.87 g AgNO3) × 95% = 0.00009953 g AgNO3 10mL of 50/50 water/ethanol solution was made by combining 5mL of water and 5mL of ethanol in a 10mL graduated cylinder. 10mL of water/ethanol solution was poured into Erylenmeyer flask along with a stir bar. The Erylenmeyer flask containing the solution is covered with aluminum foil and placed on stir plate under fume hood for 24 hours. Observations The clay and AgNO3 solution appeared white in color during stirring.