| A1: Na | B1: Cl2 |
| A2: Na2O | B2: HCl |
| A3: NaOH | B3: CuCl2 |
| A4: Na2CO3 | B4: AlCl3 |
| A5: Na2S | B5: MgCl2 |
| A6: Na2SO4 | B6: BaCl2 |
\(2NaCl\xrightarrow[]{đpnc}2Na+Cl_2\uparrow\\ 2Na+Cl_2\xrightarrow[]{t^o}2NaCl\\ 4Na+O_2\xrightarrow[]{t^o}2Na_2O\\ Cl_2+H_2\xrightarrow[]{a/s}2HCl\\ Na_2O+2HCl\rightarrow2NaCl+H_2O\\ Na_2O+H_2O\rightarrow2NaOH\\ 2HCl+CuO\rightarrow CuCl_2+H_2O\\ NaOH+NaHCO_3\rightarrow Na_2CO_3+H_2O\\ 2Al+3CuCl_2\rightarrow2AlCl_3+3Cu\downarrow\\ Na_2CO_3+BaS\rightarrow BaCO_3\downarrow+Na_2S\\ 3Mg+2AlCl_3\rightarrow3MgCl_2+2Al\downarrow\\ Na_2S+MgCl_2+2H_2O\rightarrow Mg\left(OH\right)_2\downarrow+H_2S\uparrow+2NaCl\)
\(Na_2S+H_2SO_4\rightarrow Na_2SO_4+H_2S\uparrow\\ MgCl_2+Ba\left(OH\right)_2\rightarrow Mg\left(OH\right)_2\downarrow+BaCl_2\\ Na_2SO_4+BaCl_2\rightarrow BaSO_4\downarrow+2NaCl\)
