Difference between revisions of "User:Melissa Novy/Notebook/CHEM-572/2013/02/19"

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(ISE Study of PLA2002D + 5 wt% 100Ag-LMT)
(ISE Study of PLA2002D + 5 wt% 100Ag-LMT)
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   '''(3.53 × 10<sup>-5</sup> mol Ag<sup>+</sup>) ÷ (0.05062 g 100Ag-LMT) = x mol Ag<sup>+</sup> ÷ (0.025 g 100Ag-LMT)'''
 
   '''(3.53 × 10<sup>-5</sup> mol Ag<sup>+</sup>) ÷ (0.05062 g 100Ag-LMT) = x mol Ag<sup>+</sup> ÷ (0.025 g 100Ag-LMT)'''
 
   '''4.47 × 10<sup>-8</sup>mol Ag<sup>+</sup> in 0.025 g 100Ag-LMT of 0.5 g PLA2002D + 5 wt% 100Ag-LMT film'''
 
   '''4.47 × 10<sup>-8</sup>mol Ag<sup>+</sup> in 0.025 g 100Ag-LMT of 0.5 g PLA2002D + 5 wt% 100Ag-LMT film'''
 
==ISE Study of PLA2002D + 5 wt% 100Ag-LMT==
 
* Calculations:
 
** To determine maximum [Ag<sup>+</sup>] possible, assume that all Ag<sup>+</sup> leaches out of solution.
 
** The solution contained 50 mL pure H<sub>2</sub>O and 1 mL [[User:Melissa_Novy/Notebook/CHEM-572/2013/02/12|ionic strength adjuster]].  The recommended ratio of solution to ionic strength adjuster is 50 mL to 1 mL.  Then, 0.50 g of film was added to the solution.
 
 
  '''(4.47 × 10<sup>-8</sup>mol Ag<sup>+</sup>0 ÷ 0.051 L = 8.76 × 10<sup>-7</sup> M or 0.876 μM'''
 
<br>
 
 
* Protocol
 
*# Pour 50 mL pure H<sub>2</sub>O into a clean, dry 250-mL Erlenmeyer flask and add 1 mL of 5 M KNO<sub>3</sub>.
 
*# Measure the conductivity of the solution with the ISE.
 
*# Place the film into the flask, swirl, and measure the conductivity.
 
*# Wait 30 min, then measure the conductivity again.
 
*# Repeat the above step 5 more times.
 
  
  

Revision as of 11:21, 20 February 2013

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Objectives

  • Grind 100Ag-LMT made on 2013/02/05 into a fine powder.
  • Make PLA2002D + 5 wt% 100Ag-LMT film.
  • Make PLA2002D + 5 wt% LMT film.

PLA2002D Films

  • The protocol on 2013/02/06 was used to make the films.
  • Each film contained 5 wt% of 100Ag-LMT or LMT for one gram of PLA2002D.


  • PLA2002D + 5 wt% LMT film
    • Theoretical mass PLA2002D: 1 g
    • Theoretical mass LMT: 0.05 g
    • Actual mass PLA2002D: 1.009185 g
    • Actual mass LMT: 0.05060 g


  • PLA2002D + 5 wt% 100Ag-LMT film
    • Theoretical mass PLA2002D: 1 g
    • Theoretical mass 100Ag-LMT: 0.05 g
    • Actual mass PLA2002D: 1.01686 g
    • Actual mass 100Ag-LMT: 0.05062 g
    • Final mass of PLA2002D + 5 wt% 100Ag-LMT: 0.97 g


  • Actual content of silver in 0.5 g PLA2002D + 5 wt% 100Ag-LMT:


  0.00622 g AgNO3 × (1 mol AgNO3/169.87 g AgNO3) × (1 mol Ag+/1 mol AgNO3) = 3.66 × 10-5 mol Ag+
  [Ag+] in 5 mL 100Ag-LMT filtrate was 0.000253614 M
  0.000253614 M Ag+ × 0.005 L = 1.2681 × 10-6 mol Ag+
  Therefore, 3.66 × 10-5 mol Ag+ − 1.2681 × 10-6 mol Ag+ = 3.53 × 10-5 mol Ag+ was exchanged into 100Ag-LMT.


  0.05 × 0.5 g PLA2002D + 5 wt% 100Ag-LMT = 0.025 g 100Ag-LMT
  (3.53 × 10-5 mol Ag+) ÷ (0.05062 g 100Ag-LMT) = x mol Ag+ ÷ (0.025 g 100Ag-LMT)
  4.47 × 10-8mol Ag+ in 0.025 g 100Ag-LMT of 0.5 g PLA2002D + 5 wt% 100Ag-LMT film