5. Manganese was oxidized to MnO4- using the method described above. Standard solutions were photometered under the same conditions as the analyzed solution. Determine the mass fraction (%) of manganese and chromium in steel.
КMnO4 K2Cr2O7 Research solution.
C, 0.01 0.02 0.03 0.05 0.1 0.15

A533 0.213 0.430 0.647 - - - 350
А432 0.083 0.165 0.245 0.215 0.428 0.644 0.595

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