A student developed a chromatogram and found that the eluent front traveled 94 m

Question

A student developed a chromatogram and found that the eluent front traveled 94 mm and the Zn^2+ cation traveled 24 mm. In the development of chromatogram of a mixture of cations, the eluent front traveled 87 mm. If Zn^2+ is a cation of the unknown mixture, where will its band appear in the chromatogram? The chromatogram for the separation of amino acids using a butanoic acid/acetic eluent is sketched at right. Use a ruler to determine D_amino acid and then calculate R_f for each amino acid. D_solvent, eluent = ____

Explanation / Answer

6. In two separate chromatograms the solvent front travelled 94 mm and a second time 87 mm. The zinc ion would travel proportionally with the eluent front even in a mixture of cation 24*87/94=22.212mm travelled in the second chromatogram.

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