- NaCl,HCl,Na2CO3,KOHNaCl , HCl , Na _{2} CO _{3}, KOH
- H2SO4,NaCl,KNO3,CO2H _{2} SO _{4}, NaCl , KNO _{3}, CO _{2}
- KNO3,HCl,KOH,H2SO4KNO _{3}, HCl , KOH , H _{2} SO _{4}
- HCI, CO2,Na2CO3,H2SO4CO _{2}, Na _{2} CO _{3}, H _{2} SO _{4}