Если там гидрокарбонат натрия, то...
1. Na + KOH = NaOH + K
2. 2NaOH + H₂CO₃ = Na₂CO₃ + 2H₂O
3. Na₂CO₃ + H₂O = NaHCO₃ + NaOH
4. <span>NaHCO₃ + NaOH = Na</span>₂CO₃ + H₂O
CaSO4 +2HCl -> CaCl2 + H2SO4
CaCl2+ 2HBr -> CaBr2+ 2HCl
6HCl+ 2Al -> 2AlCl3+ 3H2
2AlCl3+ 3H2CO3-> Al2(CO3)3 + 6HCl
2)
HCl
2 HCl+ Ca-> CaCl2 + H2
HCl+ NaOH-> NaCl + H2O
2HCl + CuO-> CuCl2 + H2O
HCl+ CaCO3-> CaCl2 + H2CO3
Zn_2HCL=H2+ZnCL2
CH4+2O2=CO2+2H2O
H2SO4+Na2O=H2O+Na2SO4
K2O+H2O=2KOH