The densities and sound speeds Of L-alanine in aqueous NaBr, KCl, KBr and MgCl2 are reported at 298.15 K. These data are used to derive apparent molar volumes and compressibilities. The apparent molar properties of L-alanine are greatly influenced by MgCl2 than any other electrolytes studied herein. The apparent molar properties of L-alanine are correlated with concentration of the electrolyte using two adjustable parameters, which in turn are employed to predict the properties of electrolytes with good accuracy. The proposed method yields good estimates of densities and sound speeds.