98. Solving a chemistry problem

98. Solving a chemistry problem

1. Create electronic equations and indicate which process - oxidation or reduction - occurs during the following transformations:
S-2→S 6; Cl-→Cl 5 ;Cu0→Cu 2
Based on electronic equations, place the coefficients in the equation of the reaction following the scheme:
NaCrO2 Br NaOH→Na2CrO4 NaBr H2O

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