3. Решение задачи по химии №000 382

4. Calculate the concentration of Cr(VII) and Mn(VII) in the solution according to the following cuvette photometry data: l=2 cm.
At λ=550 nm, eλ(K2Cr2O2)=0.0 eλ(KMnO4)=2100; A=0.230
At λ=430 nm, eλ(K2Cr2O2)=220; eλ(KMnO4)=500; A=0.400

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