Решите реакции
КI+HClO+C6H6=
Na2S+H2S04+Na2SO3=
K2Cr2O2+H2SO4+NA2SO3=
KI+H2SO4+H2O2+C6H6=
KMnO4+H2SO4+H2O2=
КI+HClO+C6H6=
Na2S+H2S04+Na2SO3=
K2Cr2O2+H2SO4+NA2SO3=
KI+H2SO4+H2O2+C6H6=
KMnO4+H2SO4+H2O2=
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Answers & Comments
K2Cr2O7+4H2SO4+3Na2SO3=K2SO4+Cr2(SO4)3+3Na2SO4+4H2O
2Cr(+6)+6e=2Cr(+3) окислитель
S(+4)-2e=S(+6) восстановитель
H2O2 + H2SO4 + 2KI = I2 ↓ + 2H2O + K2SO4 2KI + H2SO4 (разб. ) + H2O2 = I2↓ + K2SO4 + 2H2O
2KMnO4 + 3H2SO4 +5H2O2 = 2MnSO4 +K2SO4 +5O2 +8H2O
Mn (+7) +5 e= Mn(+2) 2
2O(-) -2e= O2 5