\(a,2NaCl\underrightarrow{\text{điện phân nóng chảy}}2Na+Cl_2\uparrow\\ Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\\ NaClO+CO_2+H_2O\rightarrow NaHCO_3+HClO\\ NaHCO_3+HCl\rightarrow NaCl+CO_2\uparrow+H_2O\\ NaCl+AgNO_3\rightarrow AgCl\downarrow+NaNO_3\)
\(2NaNO_3\underrightarrow{t^o}2NaNO_2+O_2\uparrow\\ b,\left(1\right)2KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2\uparrow+8H_2O\\ \left(2\right)2Na+Cl_2\underrightarrow{t^o}2NaCl\\ \left(3\right)NaCl+H_2SO_4\rightarrow Na_2SO_4+2HCl\uparrow\\ \left(4\right)Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\\ \left(5\right)2FeCl_2+Cl_2\underrightarrow{t^o}2FeCl_3\)
\(\left(6\right)Cl_2+2NaBr\rightarrow2NaCl+Br_2\uparrow\\ \left(7\right)Br_2+H_2\underrightarrow{t^o}2HBr\\ \left(8\right)HBr+AgNO_3\rightarrow AgBr\downarrow+HNO_3\\ \left(9\right)2AgBr\underrightarrow{as}2Ag+Br_2\uparrow\)
\(\left(10\right)Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\\ \left(11\right)Cl_2+Ca\left(OH\right)_2\rightarrow CaOCl_2+H_2O\\ \left(12\right)2CaOCl_2+CO_2+H_2O\rightarrow CaCO_3\downarrow+CaCl_2+2HClO\\ \left(13\right)CaCO_3+2HCl\rightarrow CaCl_2+CO_2\uparrow+H_2O\)
