Помогите плиз с цепочкой реакции этен -> x1 -> этаналь (kmno4, h2so4) -> x2 (cl2) -> x3 (na2co3) -> x4

CH2=CH2+H2O=CH3-CH2OH
CH3-CH2OH+CuO=Cu+H2O+CH3-CHO
5CH3-CHO+2KMnO4+3H2SO4=5CH3-COOH+K2SO4+2MnSO4+3H2O
CH3-COOH+Cl2=CH2Cl-COOH+HCl
CH2Cl-COOH+Na2CO3=NaHCO3+CH2Cl-COONa