\(a,2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\\ 2CH_3OH+2Na\rightarrow2CH_3ONa+H_2\\ 2CH_3COOH+2Na\rightarrow2CH_3COONa+H_2\\ 2CH_3-CH_2-COOH+2Na\rightarrow2CH_3-CH_2-COONa+H_2\)
\(b.CH_3COOH+NaOH\rightarrow CH_3COONa+H_2O\\ CH_2-CH_2-COOH+NaOH\rightarrow CH_3-CH_2-COONa+H_2O\\ c.2CH_3COOH+CaO\rightarrow\left(CH_3COO\right)_2Ca+H_2O\\2 CH_3-CH_2-COOH+CaO\rightarrow\left(CH_3-CH_2-COO\right)_2Ca+H_2O\)