What does a substance being "infinitely soluble" in water imply?

When a substance is described as "infinitely soluble" in water, it indicates that it can dissolve in water at any proportion without reaching a state of saturation. This means that the substance is able to mix uniformly with water regardless of the amounts combined, resulting in a homogeneous solution. In practical terms, you could keep adding this substance to water, and it would continue to dissolve rather than forming a separate layer or precipitate.

The nature of infinite solubility allows for an even distribution of the solute throughout the solvent, which is essential in applications like pharmaceuticals and chemical reactions where uniform concentration is necessary. The concept also excludes the possibility of forming a limited saturated solution, which would occur with substances that have definite solubility limits.