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Автор - vegaflex177

решите пожалуйста овр уравнение химия
K2Cr2O7 + H2SO4 +Na2S = Cr(SO4)3 + S + K2SO3 + H2O + Na2SO4

Ответ

Автор - elalenka

Ответ:

Это будет так

3 S - -II - 24 e- → 3 SV - I(окисление)

8 Cr -VI + 24 e- → 8 Cr- III(восстановле́ние)

И в итоге.

3 Na2S+ 4 K2Cr2O7 +16 H2SO4 → 3 Na2SO4 +4 Cr2(SO4)3 + 4 K2SO4 +16 H2O

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