User:Keyun Wang/Notebook/Experimental Biological Chemistry I/2013/01/29: Difference between revisions
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==Procedure== | ==Procedure== | ||
* | * 2.87g of AgNO<sub>3</sub> was weighted out and placed in a 50mL Erylenmeyer flask. | ||
* 0. | * 0.3g of Laponite clay was weighted out and placed in same Erlenmeyer flask as above. | ||
* The | * The 2.87g of AgNO<sub>3</sub> was calculated in the following ways: | ||
Cationic exchange capacity of Laponite: 0.55 milliequivilient/gram | Cationic exchange capacity of Laponite: 0.55 milliequivilient/gram | ||
Weight % of silver to be exchanged in Clay: 95% | Weight % of silver to be exchanged in Clay: 95% | ||
Calculation is shown as follows: | Calculation is shown as follows: | ||
0.3 g LMT × (55 meqv/100 g LMT) × (1 mol Ag<sup>+</sup>/1000 meqv) × (107.86 g Ag<sup>+</sup>/1 mol Ag<sup>+</sup>) × (1 mol Ag<sup>+</sup>/1 mol AgNO<sub>3</sub>) × (1 mol AgNO<sub>3</sub>/169.87 g AgNO<sub>3</sub>) × 95% = 0.00009953 g AgNO<sub>3</sub> | |||
* 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 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. | * 10mL of water/ethanol solution was poured into Erylenmeyer flask along with a stir bar. | ||
* The Erylenmeyer flask containing the solution is placed on stir plate for 24 hours. | * 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 AgNO<sub>3</sub> solution appeared white in color during stirring. | |||
Revision as of 11:53, 5 February 2013
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Purpose
Procedure
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
Observations
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