Метод полуреакции

[Anettya]

Помогите решить пожалуйста методом полуреакции! Хотя бы несколько......У меня что-то не получается(((

KH + H2O2 + H2SO4 -> H2 + H2O + K2SO4

Zn + H3AsO3 + HCl -> AsH3 + ZnCl2 + H2O

KMnO4 + Na2S2O3 + H2SO4 -> Na2SO4 + MnSO4 + H2O

MnO2 + NO2 -> Mn(NO3)2

Al + NaOH + H2O -> Na3( Al(OH)6) + H2

K2Cr2O4 + HCl -> Cl2 + CrCl3 + H2O + KCl

H2S2 + Cl2 + H2O -> H2SO4 + HCl

NaNO2 + Zn + NaOH + H2O -> NH3 + ................(не знаю,что здесь образуется)

Na2Cr2O7 + NaNO2 + H2SO4 -> NaNO3 + Cr2(SO4)3 + Na2SO4 + H2O

N2H4 + HNO2 -> N2 + H2O

[knife]

[wigrafzrolok]

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[wigrafzrolok]

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