Final answer:
The compound that is insoluble among the given options is D) PbCl₂. (option D)
Step-by-step explanation:
Referring to the solubility table, compounds with chloride ions (Cl⁻) are generally soluble, but lead chloride (PbCl₂) is an exception and is insoluble. This is due to the fact that lead chloride falls under the category of sparingly soluble salts. When dissolved in water, it forms a precipitate because the concentration of chloride ions exceeds the solubility product constant (Ksp) for lead chloride. The insolubility of PbCl₂ results in the formation of a white precipitate in the solution.
Understanding solubility rules is essential in predicting whether a compound will dissolve or form a precipitate in a given solvent. The solubility table provides information on the solubility properties of various ions and compounds in different solutions. In this case, the identification of PbCl₂ as insoluble is crucial for determining the correct answer.
Knowing the solubility behavior of different compounds is particularly useful in chemistry, especially in tasks like qualitative analysis and precipitation reactions. Precipitation reactions involve the formation of insoluble products, and the solubility table is a valuable tool for predicting the outcomes of such reactions based on the properties of the ions involved.(option D)