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solubility

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2025-08-29 03:10:50

solubility】Solubility refers to the ability of a substance (solute) to dissolve in a solvent, typically water, to form a homogeneous solution. It is an important concept in chemistry, affecting everything from pharmaceutical formulations to environmental science and industrial processes. Understanding solubility helps in predicting how substances will behave under different conditions and is crucial for designing chemical reactions and processes.

Summary of Solubility

Solubility is determined by several factors, including the nature of the solute and solvent, temperature, pressure, and the presence of other substances. The general rule is "like dissolves like," meaning that polar substances tend to dissolve in polar solvents, while nonpolar substances dissolve in nonpolar solvents.

There are various ways to express solubility, such as grams per 100 mL of solvent or molarity. Some substances are highly soluble, while others are only slightly soluble or insoluble.

Below is a summary of common solubility characteristics:

Substance Solvent Solubility Notes
Sodium chloride (NaCl) Water Highly soluble Dissociates into ions
Sugar (C₁₂H₂₂O₁₁) Water Highly soluble Molecular dissolution
Oil Water Insoluble Nonpolar, immiscible
Ethanol Water Miscible Polar, forms hydrogen bonds
Calcium carbonate (CaCO₃) Water Slightly soluble Used in limestone
Carbon dioxide (CO₂) Water Moderately soluble Dissolves under pressure
Iodine (I₂) Water Insoluble Soluble in organic solvents

In practical applications, solubility plays a key role in drug delivery, where the solubility of a compound determines its absorption in the body. In environmental contexts, it influences how pollutants spread in water bodies. Industrial processes also rely on solubility to control reaction conditions and separation techniques.

Overall, solubility is a fundamental property that affects many areas of science and technology. A deeper understanding of solubility can lead to better material design, more efficient chemical processes, and improved environmental management.

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