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Equilibrium Constant Determination You will have to determine the equilibrium constant for the reaction between aqueous iron(III) ion and thiocyanate ion. The equilibrium equation is given below: Fe3+ (aq) + NCS– (aq) <---> FeNCS2+ (aq) yellow          colorless             red The absorbance of light is measured using a spectrophotometer. The higher the absorbance, the higher the concentration of FeNCS2+ present. At room temperature, 5.00ml of 0.200M iron(III)nitrate solution was mixed with 5.00ml of 0.200M potassium thiocyante solution. The absorbance of this mixture was 0.55. A 1cm thick cuvette was used. What is the path length (b) ? What is the molar extinction coefficient (E) ?

Equilibrium Constant Determination You will have to determine the equilibrium constant for the reaction between aqueous iron(III) ion and thiocyanate ion. The equilibrium equation is given below: Fe3+ (aq) + NCS– (aq) <---> FeNCS2+ (aq) yellow          colorless             red The absorbance of light is measured using a spectrophotometer. The higher the absorbance, the higher the concentration of FeNCS2+ present. At room temperature, 5.00ml of 0.200M iron(III)nitrate solution was mixed with 5.00ml of 0.200M potassium thiocyante solution. The absorbance of this mixture was 0.55. A 1cm thick cuvette was used. What is the path length (b) ? What is the molar extinction coefficient (E) ?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Equilibrium Constant Determination

You will have to determine the equilibrium constant for the reaction between aqueous iron(III) ion and thiocyanate ion. The equilibrium equation is given below:

Fe3+ (aq) + NCS– (aq) <---> FeNCS2+ (aq)

yellow          colorless             red

The absorbance of light is measured using a spectrophotometer. The higher the absorbance, the higher the concentration of FeNCS2+ present.

At room temperature, 5.00ml of 0.200M iron(III)nitrate solution was mixed with 5.00ml of 0.200M potassium thiocyante solution. The absorbance of this mixture was 0.55. A 1cm thick cuvette was used.

  1. What is the path length (b) ? What is the molar extinction coefficient (E) ?
  2. What is the equilibrium concentration of iron(III)thiocyante of our solution?
  3. What are the equilibrium concentrations of Fe3+ and SCN- in our solution?

Please help I am so confised!

Analysis of Fe-SCNequilibrium y = 5420.3x - 0.0059 0.25 0.2 0.15 0.1 0.05 -0.05 0.0000 0.00002 0.000030.00004 0.00005 [Fe-SCN product] (M) Abs @ 487 nm
Transcribed Image Text:Analysis of Fe-SCNequilibrium y = 5420.3x - 0.0059 0.25 0.2 0.15 0.1 0.05 -0.05 0.0000 0.00002 0.000030.00004 0.00005 [Fe-SCN product] (M) Abs @ 487 nm
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