Масса нового растовра = 70 + 30 = 100г
масса щелочи = 0,2*70 = 14г
CH3-CH3 ---- CH2=CH2 + H2
CH2=CH2 + H2O ----- CH3-CH2OH
CH3-CH2OH + CuO ----- CH3-CHO + Cu + H2O
CH3-CHO + Ag2O ---- CH3-COOH + 2Ag
CH3-COOH + C2H5OH --- CH3-CO-O-C2H5 + H2O
2K + 2H₂O = 2KOH + H₂
KOH + HCl = KCl + H₂O
KCl + AgNO₃ = AgCl + KNO₃