41. Solving a chemistry problem
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4. Using the paper chromatography method, a mixture of Cu2 , Pb2 , Cd2 , Hg2 can be effectively separated. The corresponding Rf values for cations are: Cu2 - 0.17, Pb2 -0.27, Cd2 -0.73, Hg2 - 0.81. Determine which cations the unknown sample contained, the chromatogram of which is shown below
A→B
5 15.
A→B
5 15.
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