(1)①CaCO 3+2HCl=CaCl 2+H 2O+CO 2↑ ②Ca(OH) 2+2HCl= 2H 2O+CaCl 2
(2)①Na 2CO 3+2HCl=2NaCl+H 2O+CO 2↑ ②CaCl 2、HCl、NaCl或CaCl 2、NaCl
(1)①CaCO 3+2HCl=CaCl 2+H 2O+CO 2↑ ②Ca(OH) 2+2HCl= 2H 2O+CaCl 2
(2)①Na 2CO 3+2HCl=2NaCl+H 2O+CO 2↑ ②CaCl 2、HCl、NaCl或CaCl 2、NaCl