unlöslichem

Unlöslich is an adjective used to describe a substance that does not dissolve in a given solvent under specified conditions. The form unlöslichem is the dative singular form (for example: in unlöslichem Wasser), illustrating how the word is declined in German grammar.

In chemistry, insolubility refers to very low solubility rather than absolute absence of dissolution. The solubility of a substance depends on temperature, solvent, pH and other factors. For ionic compounds, the concept is often expressed by a solubility product constant (Ksp): if the product of ion concentrations exceeds Ksp, a solid remains or forms as a precipitate. Therefore, many salts are described as unlöslich in water at standard conditions, even though they may dissolve to a tiny extent.

Common examples of insoluble or sparingly soluble salts in water include silver chloride (AgCl), barium sulfate (BaSO4) and calcium carbonate (CaCO3). These substances form visible precipitates in appropriate reactions and are frequently used in qualitative analysis and precipitation methods.

Practical significance extends to environmental science, pharmacology and materials science. Insolubility affects the transport and fate of minerals and pollutants, the bioavailability of drugs, and the design of separation processes. Because solubility is sensitive to conditions, a substance labeled unlöslich in one setting may dissolve under different temperatures, pressures, or in different solvents.

Overall, unlöslich conveys that dissolution is negligible under the stated conditions, while recognizing that true absolute insolubility is rare in chemistry.