User:Khyra A. Neal/Notebook/Chem 571/2014/10/15: Difference between revisions

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==October 15, 2014==
==October 15, 2014==
===Tasklist===
===Tasklist===


1.  Electrophoresis  
==Electrophoresis==


* Warm solutions for 5 minutes at 40°C that were prepared on [http://openwetware.org/wiki/User:Khyra_A._Neal/Notebook/Chem_571/2014/10/14 October 14, 2014]
* Warm solutions for 5 minutes at 40°C that were prepared on [http://openwetware.org/wiki/User:Khyra_A._Neal/Notebook/Chem_571/2014/10/14 October 14, 2014]
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===Determination of Dialyzed KI Samples extracted on [http://openwetware.org/wiki/User:Khyra_A._Neal/Notebook/Chem_571/2014/10/08 October 14, 2014]===


2.  Determination of Dialyzed KI Samples extracted on [http://openwetware.org/wiki/User:Khyra_A._Neal/Notebook/Chem_571/2014/10/08 October 14, 2014]
==Determination of KI Concentration by Titration==
 
* Determination of KI Concentration by Titration
 
Standardization:
 
AgNO<sub>3</sub> + NH<sub>4</sub>SCN → AgSCN + NH<sub>4</sub>NO<sub>3</sub>
KI + AgNO<sub>3</sub>(excess) → AgI (s) + AgNO<sub>3</sub> +KNO<sub>3</sub>
 
Initial AgNO<sub>3</sub>: 0.075 M AgNO<sub>3</sub> x 0.002 L AgNO<sub>3</sub> = '''0.00015 mol AgNO<sub>3</sub>'''
 
AgNO<sub>3</sub> (neutralized): 0.00968 M NH<sub>4</sub>SCN x 0.0104 L NH<sub>4</sub>SCN x (1 mol AgNO<sub>3</sub> / 1 mol NH<sub>4</sub>SCN ) = '''0.000100672 mol AgNO<sub>3</sub>'''
 
Moles of KI: 0.00015 mol AgNO<sub>3</sub> <sub>initial</sub> - 0.000100672 mol AgNO<sub>3</sub> <sub>neutralized</sub> = '''0.0000493 mol KI'''


[KI]= 0.0000493 mol KI / 0.001 L KI = '''49.3 mM KI'''
* Standardization:
** AgNO<sub>3</sub> + NH<sub>4</sub>SCN → AgSCN + NH<sub>4</sub>NO<sub>3</sub>
** KI + AgNO<sub>3</sub>(excess) → AgI (s) + AgNO<sub>3</sub> +KNO<sub>3</sub>
*** Initial AgNO<sub>3</sub>: 0.075 M AgNO<sub>3</sub> x 0.002 L AgNO<sub>3</sub> = '''0.00015 mol AgNO<sub>3</sub>'''
*** AgNO<sub>3</sub> (neutralized): 0.00968 M NH<sub>4</sub>SCN x 0.0104 L NH<sub>4</sub>SCN x (1 mol AgNO<sub>3</sub> / 1 mol NH<sub>4</sub>SCN ) = '''0.000100672 mol AgNO<sub>3</sub>'''
*** Moles of KI: 0.00015 mol AgNO<sub>3</sub> <sub>initial</sub> - 0.000100672 mol AgNO<sub>3</sub> <sub>neutralized</sub> = '''0.0000493 mol KI'''
*** [KI]= 0.0000493 mol KI / 0.001 L KI = '''49.3 mM KI'''


'''NOTE''' The final concentration of NH<sub>4</sub>SCN was determined by titration standardization on [http://openwetware.org/wiki/User:Khyra_A._Neal/Notebook/Chem_571/2014/10/08 October 8, 2014]
'''NOTE''' The final concentration of NH<sub>4</sub>SCN was determined by titration standardization on [http://openwetware.org/wiki/User:Khyra_A._Neal/Notebook/Chem_571/2014/10/08 October 8, 2014]

Revision as of 09:00, 21 October 2014

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October 15, 2014

Tasklist

Electrophoresis

  • Warm solutions for 5 minutes at 40°C that were prepared on October 14, 2014
  • Load samples to premade gel
    • Well 1: Precision Plus Protein All Blue Standards
    • Well 3: 0.12 g/L lysozyme Unk A
    • Well 4: 30:1 Lysozyme colloid
    • Well 5: 0.12 g/L Lysozyme
    • Well 6: 0.6 g/L Lysozyme
    • Wells 8-12 contain solutions prepared by Dr. Fox
  • Run for 40 minutes at 200V
  • Develop/Stain your gel
    • Place gel in Fixative Solution (40% methanol, 10% acetic acid, 50% water) for 30 minutes
    • Place gel in Stain Solution (0.025% (w/v) Coomassie Blue, 10% acetic acid, 90% water) for 1 hour
    • Place gel in Destain Solution (10% acetic acid, 90% water) for 15 minutes
      • Repeat this step with fresh destain solution 2 more times

The original protocol for electrophoresis was written by Dr. Hartings


Determination of Dialyzed KI Samples extracted on October 14, 2014

Determination of KI Concentration by Titration

  • Standardization:
    • AgNO3 + NH4SCN → AgSCN + NH4NO3
    • KI + AgNO3(excess) → AgI (s) + AgNO3 +KNO3
      • Initial AgNO3: 0.075 M AgNO3 x 0.002 L AgNO3 = 0.00015 mol AgNO3
      • AgNO3 (neutralized): 0.00968 M NH4SCN x 0.0104 L NH4SCN x (1 mol AgNO3 / 1 mol NH4SCN ) = 0.000100672 mol AgNO3
      • Moles of KI: 0.00015 mol AgNO3 initial - 0.000100672 mol AgNO3 neutralized = 0.0000493 mol KI
      • [KI]= 0.0000493 mol KI / 0.001 L KI = 49.3 mM KI

NOTE The final concentration of NH4SCN was determined by titration standardization on October 8, 2014







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