111. Solving a chemistry problem

111. Solving a chemistry problem

K2Cr2O7 H2S04 FeS04 → K2S04 H2O Cr2(S04)3 Fe2(S04)3
HClO3 H2SO3 → HCI H2SO4
Write electronic equations. Arrange the coefficients in the reaction equations. For each reaction, indicate which substance is the oxidizing agent, which is the reducing agent; which substance is oxidized and which is reduced.

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