12.3. A solution of potassium dichromate with a volume of V ml was titrated with iron (II) ions generated at a current strength I A for a time t min, the end of the reaction was recorded according to photometric data:
Option 3
V, ml 30.00
I, A 0.250
t, min 35.0
Determine the molar concentration of the equivalent of K2Cr2O7
(feqv=1/6).

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