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

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Current revision (14:53, 5 February 2013) (view source)
(Procedure)
 
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==Procedure==
==Procedure==
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* 3.45g of AgNO<sub>3</sub> was weighted out and placed in a 50mL Erylenmeyer flask.  
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* 2.87g of AgNO<sub>3</sub> was weighted out and placed in a 50mL Erylenmeyer flask.  
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* 0.8g of Laponite clay was weighted out and placed in same Erlenmeyer flask as above.
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* 0.3g of Laponite clay was weighted out and placed in same Erlenmeyer flask as above.
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* The 0.8g of Laponite clay was calculated in the following ways:
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* 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:
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   ___________
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   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.
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* The Erylenmeyer flask containing the solution is placed on stir plate for 24 hours.
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* The Erylenmeyer flask containing the solution is covered with aluminum foil and placed on stir plate under fume hood for 24 hours.
 +
 
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==Observations==
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* The clay and AgNO<sub>3</sub> solution appeared white in color during stirring.
    
    

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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.



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