88. Solving a chemistry problem
275. Make the equations of redox reactions using the half-reaction method. Indicate the oxidizing agent and reducing agent, the reaction of the medium. For what purposes can these reactions be used in qualitative analysis?
1) Sb2S3 HNO3 2) CuSO4 Na2S2O3
3) Na2SO3 K2Cr2O7 H2SO4 4) KI KNO2 H2SO4
5) FeSO4 NaNO3 H2SO4
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