# User:Melissa Novy/Notebook/CHEM-572/2013/02/19

(Difference between revisions)
 Revision as of 14:19, 20 February 2013 (view source) (→ISE Study of PLA2002D + 5 wt% 100Ag-LMT)← Previous diff Revision as of 14:21, 20 February 2013 (view source) (→PLA2002D Films)Next diff → (One intermediate revision not shown.) Line 41: Line 41: * Actual content of silver in 0.5 g PLA2002D + 5 wt% 100Ag-LMT: * Actual content of silver in 0.5 g PLA2002D + 5 wt% 100Ag-LMT: - ** Please refer to data from the entries on [[User:Melissa_Novy/Notebook/CHEM-572/2013/02/05|2013/02/05]] and [[User:Melissa_Novy/Notebook/CHEM-572/2013/02/13|2013/02/13]] for the data listed below. + ** Please refer to the entries on [[User:Melissa_Novy/Notebook/CHEM-572/2013/02/05|2013/02/05]] and [[User:Melissa_Novy/Notebook/CHEM-572/2013/02/13|2013/02/13]] for the data listed below.

Line 53: Line 53: '''(3.53 × 10-5 mol Ag+) ÷ (0.05062 g 100Ag-LMT) = x mol Ag+ ÷ (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''' '''4.47 × 10-8mol Ag+ 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+] possible, assume that all Ag+ leaches out of solution. - ** The solution contained 50 mL pure H2O 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 × 10-8mol Ag+0 ÷ 0.051 L = 8.76 × 10-7 M or 0.876 μM''' -
- - * Protocol - *# Pour 50 mL pure H2O into a clean, dry 250-mL Erlenmeyer flask and add 1 mL of 5 M KNO3. - *# 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 14:21, 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
```