Решите пожалуйста: C2H4-C2H5OH-CH3COH-CH3COOH-CH3COONA

1) CH2=CH2 + H2O =[300°C, H3PO4]=> CH3-CH2-OH2) CH3-CH2-OH + CuO =[t°C]=> CH3-CHO + Cu + H2O3) CH3-CHO + Ag2O =[NH4OH, t°C]=> CH3-COOH + 2Ag{осадок}4) CH3-COOH + NaOH => CH3-COONa + H2O