Mg + 2HCl = MgCl2 + H2↑
Mg+ 2H[+] + 2Cl[-] = Mg[2+] + 2Cl[-] + H2↑
Mg+ 2H[+]= Mg[2+] + H2↑
Cu + HCl = \\\
Al2O3 + 6HCl = 2AlCl3 + 3H2O
Al2O3 + 6H[+] + 6Cl[-] = 2Al[3+] + 6Cl[-] + 3H2O
Al2O3+ 6H[+]= 2Al[3+] + 3H2O
CO2 + HCl = \\\
Ba(OH)2 + 2HCl = BaCl2 + 2H2O
Ba[2+] + 2OH[-] + 2H[+] + 2Cl[-] = Ba[2+] + 2Cl[-] + 2H2O
2H[+] + 2OH[-] = 2H2O
\\\ - не реагирует