ОВР

[SSSS]

Помогите пожалуйста дописать реакции: H2SO4(конц)+KBr=Br2+SO2+H2O+...
Cl2+Sn+NAOH=[Sn(OH)3]+...
И расписать их методом полуреакции)))
Заранее спасибо))

[AlanDeil]

2H2SO4+2KBr=Br2+SO2+2H20+K2SO4

Br2 + 2e = 2Br(-)

SO4(2-) + 2e + 4H(+) = SO2 + 2H2O

[wigrafzrolok]

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