Закончите уравнения c2h5cooh + ca = hcooh + na2o = c3h7cooh + caco3 = hcooh + cu(oh)2 =

1) 2C2H5COOH + Ca = (C2H5COO)2Ca + H2
2) 2HCOOH + Na2O = 2HCOONa + H2O
3) 2C3H7COOH + CaCO3 = (C3H7COO)2Ca + CO2 + H2O
4) 2HCOOH + Cu(OH)2 = (HCOO)2Cu + 2H2O