Question

CH₂=CH₂ +KMnO₄ +H₂SO₄----->CO₂ +MnSO₄ +K₂SO₄ +H₂O

Answer 1

5CH₂ = CH₂ + 12KMnO₂ + 18H₂SO₄ \(\rightarrow\) 10CO₂ + 12MnSO₄ + 6K₂SO₄ +28H₂O

 

Answer 2

ta có : \(\overset{-2}{C}H_2=\overset{-2}{C}H_2+K\overset{+7}{Mn}O_4+H_2SO_4\rightarrow\overset{+4}{C}O_2+\overset{+2}{Mn}SO_4+K_2SO_4+H_2O\)

quá trình OXH : \(2.\overset{-2}{C}\rightarrow2.\overset{+4}{C}+2.6e|\times5\)

quá trình khử : \(\overset{+7}{Mn}+5e\rightarrow\overset{+2}{Mn}|\times12\)

\(5CH_2=CH_2+12KMnO_4+18H_2SO_4\rightarrow10CO_2+12MnSO_4+6K_2SO_4+28H_2O\)