1. CaO + SO3 --> CaSO4
2. Ca(HCO3)2 --> CaCO3 + H2O + CO2↑
2NaHCO3 --> Na2CO3 + H2O + CO2↑
3. Fe + H2SO4 --> FeSO4 + H2↑
NaOH + HCl --> NaCl + H2O - реакция обмена
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1. CaO + SO3 --> CaSO4
2. Ca(HCO3)2 --> CaCO3 + H2O + CO2↑
2NaHCO3 --> Na2CO3 + H2O + CO2↑
3. Fe + H2SO4 --> FeSO4 + H2↑
NaOH + HCl --> NaCl + H2O - реакция обмена