Guest THarris Posted January 20, 2003 Share Posted January 20, 2003 The chelate CuQ2- exhibits max absorbance at 580nm. When chelating agent is present in 5 fold excess , the absorbance is dependent only upon the concentration of Cu and obeys beer law over a wide range. Neither Cu or Q absorbs at 580nm. A solution that is 1.40 x 10-4 M in Cu2+ and 6.20 x 10-4 M in Q2- has an absorbance of 0.580 in a 1.00 cm cell at 580 nm. Under the same conditions, a solution that is 1.40 x 10-4 M in Cu2+ and 3.00 10-4 M in Q2 has an absorbance of 0.410. Calculate the formation constant for the process. Cu2+ + 2Q <> CuQ2, Think it has something to do with beer additive law and perhaps simultaneous equations. If someone could help me out on this I would greatly appreciate it. With explanation as well if possible. Regards Thomas Note the subscripts didnt come out right when I posted it. Link to comment Share on other sites More sharing options...
Guest THarris Posted January 20, 2003 Share Posted January 20, 2003 anyone? Link to comment Share on other sites More sharing options...
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