Water has a high dielectric constant.
Water is unlike any other substance in that it has a very high dielectric constant. The solvent’s ability to screen charges is indicated by a high dielectric constant. It implies that in a solution, water molecules will surround both anions and cations, minimizing the attraction between the two charges.
The dielectric constant of a material is equal to the ratio of the substance’s permittivity to the permittivity of free space. It is a unitless, dimensionless quantity since it is the ratio of two similar entities.