6. Reactions are expressed by schemes:
H2S Сl2 H2O = H2SO4 HCl
K2Cg2O7 H2S H2SO4 = S Cr2(S04)3 K2SO4 H2O
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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