The aim of this thesis was to examine how the addition of three ionic liquids ([MMIM]Cl, [EMIM]Cl, [BMIM]Cl) affects the Krafft temperature (T$_K$) of sodium dodecyl sulfate (SDS). I determined T$_K$ by measuring the specific electrical conductivity of solutions as a function of temperature. First, I determined the T$_K$ values for 20, 30, 40 mM SDS in a 0,01 M solution of ionic liquids. I found that the ionic liquids lowered the T$_K$ value and that [BMIM]Cl, which has the longest alkyl chain, reduced T$_K$ the most due to the highest hydrofobic character of the ionic liquid. I compared the results for SDS in water with values from the literature and found that the T$_K$ value I determined was lower than the literature value. I attributed this deviation to different experimental conditions and potentially impure chemicals.
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