Author(s): Kuber Limbu, Sujit Kumar Shah, Ajaya Bhattarai
The precise measurement of viscosity of sodiumdodecyl sulphate (SDS) in presence and in absence of Na2SO4 and ZnSO4 in aqueous media is reported. The concentration of sodiumdodecyl sulphate (SDS) vari es from (0.06 to 0.004) mol.lt-1 where as the salts concentrations as 0.01M Na2SO4 and 0.01M ZnSO4. The results showed a sharp increase in viscosity with increase in concentration of sodiumdodecyl sulphate after the critical micelle concentration (CMC) in absence and presence of Na2SO4 and ZnSO4. The viscosity values of SDS are found to be higher in presence of Na2SO4 than in presence of ZnSO4 whereas the critical micelle concentration (CMC) value decreases more in presence of Na2SO4 and than ZnSO4. Key words: Sodiumdodecyl sulphate, viscosity, critical micelle concentration, Na2SO4, ZnSO4.