Д162 Reactions are expressed schemes: Zn + HNO3 (dil)

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Reactions are expressed schemes:
Zn + HNO3 (dil) → Zn (NO3) 2 + N2O + H2O;
SnCl2 + K2Cr2O7 + H2SO4 → Sn (SO4) 2 + CrCl3 + K2SO4 + H2O.
Make electronic equation, choose the coefficients indicate a substance in each reaction is an oxidizing agent, a reducing agent.


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