User:Melissa Novy/Notebook/CHEM-572/2013/02/06
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| - | == | + | ==Objectives== |
| - | * | + | * Make 50 mL 5 M KNO<sub>3</sub> solution for ionic strength adjustments with silver ion-selective electrode. |
| + | * Make LB/agar solution. | ||
| + | * Make PLA2002D + 5wt% Laponite (PLA + 5LMT) using dichloromethane. | ||
| + | |||
| + | ==Calculations for 5 M KNO<sub>3</sub>== | ||
| + | '''MW KNO<sub>3</sub>: 101.10 g/mol''' | ||
| + | '''0.050 L × 5 M KNO<sub>3</sub> = 0.25 mol KNO<sub>3</sub>''' | ||
| + | '''0.25 mol KNO<sub>3</sub> × (101.10 g/1 mol KNO<sub>3</sub>) = 25.275 g KNO<sub>3</sub>''' | ||
| + | |||
| + | * Actual mass KNO<sub>3</sub>: 25.2756 g | ||
| + | * KNO<sub>3</sub> was placed in a glass screw-top bottle and 50 mL of pure H<sub>2</sub>O was added. The solution was stirred and heated at 70°C for 3 hours to dissolve the KNO<sub>3</sub>. | ||
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| + | ==PLA2002D + 5wt% Laponite Film== | ||
| + | * 1 g of PLA was dissolved in 10 mL of dichloromethane in a fume hood. | ||
| + | * 0.05 g Laponite was dispersed in 5 mL of dichloromethane, and then added to the PLA solution. | ||
| + | * The solution was stirred for 1 h and then cast into a Teflon dish. | ||
| + | * The dish was left under the fume hood to encourage evaporation of the dichloromethane. | ||
Revision as of 16:08, 6 February 2013
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Objectives
Calculations for 5 M KNO3MW KNO3: 101.10 g/mol 0.050 L × 5 M KNO3 = 0.25 mol KNO3 0.25 mol KNO3 × (101.10 g/1 mol KNO3) = 25.275 g KNO3
PLA2002D + 5wt% Laponite Film
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