Abstract
We study the change in the temperature of maximum density (TMD) of a water-like solvent when small amounts of solute are added to the mixture. The water is modeled as a two length scales potential, which is known to exhibit water-like characteristic anomalies, while the solute is chosen to have an attractive interaction with the solvent. If the solute is a structure maker the TMD increases with the addition of solute, while if it is a structure breaker the TMD decreases. Both in an exact one dimensional model and using molecular dynamics in three dimensions we show that the necessary ingredient to represent structure makers is a strong solute-solvent attraction.
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