The influence of temperature and composition on the density, viscosity, and excess properties of aqueous mixtures of carboxylic-based ionic liquids can be significant. Temperature affects the density and viscosity of the mixture, with higher temperatures generally leading to lower densities and viscosities. Composition, on the other hand, refers to the proportion of carboxylic-based ionic liquids in the aqueous mixture. Changes in composition can impact the density and viscosity as well.
To provide final answers, it is necessary to conduct experiments or refer to existing research on specific carboxylic-based ionic liquids and their aqueous mixtures. The specific impact of temperature and composition on the density, viscosity, and excess properties will vary depending on the specific carboxylic-based ionic liquids and their concentrations in the mixture.