NaCl has the same equivalent weight and molecular weight. The molecular weight of sodium chloride, NaCl, is [23 + 35 = 58]. Molecular weight divided by the valence of the compound gives equivalent weight. Valence refers to how many hydrogen atoms would bond with the compound. For NaCl, thevalence is 1 because only one hydrogen atom could bond with NaCl. Equivalent weight of NaCl is [5+8/1= 58]. Hence, for NaCl, molecular weight = 58 and equivalent weight = 58