User:Paul Rothenberg/Notebook/CHEM 571 Fall 2014/2014/10/22: Difference between revisions

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==Entry title==
==KI Electrode Testing==
* Insert content here...
 
We continued with making an I- ISE to determine concentration of iodide in solution.  
 
'''Procedure'''
 
#Ag/AgCl Electrode:
##The plastic covering was removed, and stored in the 3 M NaCl solution
#Double-Junction:
##Diluted saturated KNO<sub>3</sub> was added to the double junction cell
#Silver Wire:
##A piece was cut and placed in KI/KNO<sub>3</sub> solution and electrolyzed
#KI Standard Curve:
##The Ag/AgCl electrode was placed in the double-junction electrode. The Ag/AgCl electrode was attached to the multimeter
##The silver wire was attached directly to the alligator clip
##KI solutions were tested for potential
 
 
'''Results'''
 
[[Image:KI_Electrode_Calibration_Curve_10_22.png|500px]]
 
 
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''[KI], mM'''
| align="center" style="background:#f0f0f0;"|'''ln of KI'''
| align="center" style="background:#f0f0f0;"|'''Potential, mV'''
|-
| 50||3.912023005||-278.3
|-
| 5||1.609437912||-223
|-
| 0.5||-0.693147181||-161.8
|-
| 0.05||-2.995732274||-105.1
|-
| 0.005||-5.298317367||-70
|}




Revision as of 12:16, 22 October 2014

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KI Electrode Testing

We continued with making an I- ISE to determine concentration of iodide in solution.

Procedure

  1. Ag/AgCl Electrode:
    1. The plastic covering was removed, and stored in the 3 M NaCl solution
  2. Double-Junction:
    1. Diluted saturated KNO3 was added to the double junction cell
  3. Silver Wire:
    1. A piece was cut and placed in KI/KNO3 solution and electrolyzed
  4. KI Standard Curve:
    1. The Ag/AgCl electrode was placed in the double-junction electrode. The Ag/AgCl electrode was attached to the multimeter
    2. The silver wire was attached directly to the alligator clip
    3. KI solutions were tested for potential


Results


[KI], mM ln of KI Potential, mV
50 3.912023005 -278.3
5 1.609437912 -223
0.5 -0.693147181 -161.8
0.05 -2.995732274 -105.1
0.005 -5.298317367 -70



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