Sample Eq. 1 Eq. 2 Eq. 3 Eq. 4 Eq. 5 calculated Kc (in scientific notation DETER

Question

Sample Eq. 1 Eq. 2 Eq. 3 Eq. 4 Eq. 5 calculated Kc (in scientific notation DETERMINATION OF EQUILIBRIUM CONSTANTS (10) Fill in the following table. Show sample calculations for the determination of one of your experimental K's (set up an initial, change, final calculation to determine K, for that solution-use the space provided on the next page. Report your K, values in scientific notation. (See section 14.4 in your textbook for more help.) Fe" (aq) SCN (aq) Fe(SCN) (aq) 0,0003 C: E: Kc POST-LAB QUESTIONS e fall within the range of y

Explanation / Answer

For the reaction,

              Fe3+    +   SCN-   <==>   Fe(SCN)2+

I           0.00148       0.002                       -

C          -0.0003      0.0003                 + 0.0003

E          0.00118     0.0017                    0.0003

--

Keq = [Fe(SCN)2+]/[Fe3+][SCN-]

       = (0.0003)/(0.00118)(0.0017)

       = 149.55

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