bài 1; A-NaCl, B- Hcl, C-NaOH, D-NaHCO3, E-Na2CO3
pthh
1, NaCl + H2SO4 đđ -> Na2SO4 + HCl
2, 16HCl + 2KMnO4 -> 2KCl + 2MnCl2 + 5Cl2 + 8H2O
3, Cl2 + H2 -> 2HCL
4, NaCL + H2O -> NaOH + CL2 + H2
5, NaOH + Hcl -> nacl + h2o
6, NaOH + CO2 -> NaHCO3
7, NaHCO3 + NaOH-> Na2CO3 + H2O
8, Na2CO3 + HCl -> Nacl + co2 + h20
8,
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