2KOH + H2SO4 = K2SO4 + 2H2O
2K[+] + 2OH[-] + 2H[+] + SO4[2-] = 2K[+] + SO4[2-] + 2H2O
2H[+]+ 2OH[-] = 2H2O
Na2SiO3 + BaCl2 = BaSiO3↓ + 2NaCl
2Na[+] + SiO3[2-] + Ba[2+] +2Cl[-] = BaSiO3↓ + 2Na[+] + 2Cl[-]
Ba[2+] + SiO3[2-] = BaSiO3↓
2NaOH + SO3 = Na2SO4 + H2O
2Na[+] + 2OH[-] + SO3 = Na[+] + 2SO4[2-] + H2O
2OH[-] + SO3 = SO4[2-] + H2O