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Determination of the equilibrium constant for the iodine + iodide →triiodide reaction as a function of concentration. Calculate the concentrations of iodine ([I2 ]0) and iodide ([I-]0) that would result from the dilutions if a reaction did not occur. Using the absorption measurement for triiodide (A) and its extinction coefficient, calculate the triiodide concentration ([I3-]) that results from achievement of equilibrium, them calculate the final concentrations of iodine ([I2]) and iodide ([I-]) bysubtraction. Finally, calculate the value of the equilibrium constant (Keq).
v (I2)
V (KI)
V (h2o)
[I2] M
[I-] M
A
T (celcius)
I3 M
I2 M
I- M
2
1
.505
23.3
.321
23.5
.249
22.2
3
0
.682
22.4
.322
21.9
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