Ответ:

1.г

2.а

3.в

4.б

1. 2CH3COOH+Zn→(CH3COO)2Zn+H2↑

2. 2CH3COOH+CaO→(CH3COO)2Ca+H2O

3. (CH3COO)2Ca+2HCl→2CH3COOH + CaCl2

4. CaCl2+2AgNO3→Ca(NO3)2+2AgCl