Хімія cao + hno3 = koh + hcl = na2o + hscu = zn + h2so4 = ca + h2o = na2s + hbr = koh + co2 = naoh + so3 = k2so3 + cacl2 = cr(no3)2 + koh =

CaO + 2HNO3 -->Ca(NO3)2+H2O
KOH + HCl -->KCL+H2O
 Na2O + HSCu ≠
Zn + H2SO4 -->ZnSO4+H2
Ca + 2H2O -->Ca(OH)2+H2
 Na2S + HBr -->NaBr+H2S
2KOH + CO2 -->K2CO3+H2O
 2NaOH + SO3 =Na2SO4+H2O
 K2SO3 + CaCl2 = 2KCL+CaSO3
Cr(NO3)2 + 2KOH =Cr(OH)2+2KNO3

CaO + 2 HNO3 = Ca(NO3)2 + H2O
KOH + HCl = H2O + KCl
Na2O + HSCu = CuO + HSNa2
Zn+H2SO4=H2+ZnSO4
Ca + 2 H2O = Ca(OH)2 + H2
Na2S + 2 HBr = H2S + 2 NaBr
2 KOH + CO2 = H2O + K2CO3
2 NaOH + SO3 = H2O + Na2SO4