29. Решение задачки по химии №120

231. How are standard electrode potentials of oxidation-reduction systems calculated? Based on the electron-ion equations, arrange the coefficients in the system
Cr3 NO3- H2O↔Cr2O72- NO H
Based on the values ​​of the standard electrode potentials, determine whether the forward or reverse reaction will occur in this system under standard conditions.
SO42- Cr3 H2O↔SO32- Cr2O72- H

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