Parameters affecting solubility: Temperature: To dissolve a crystalline solid it is neccesary to break down the crystal lattice and to solvate the formed ions.From a thermodynamic point of view this can be expressed as: △Hsolution=△Hcr+△Hsolvation △Hsolution dissolution enthalpy △HCr crystal lattice enthalpy AHsolvation solvation enthalpy AHsolvation is always 0