Definition

1. Noun:
   • The quality or property of being soluble; the ability of a substance to dissolve in a liquid solvent. This is the primary scientific meaning, referring to the physical characteristic of a solid, liquid, or gas to form a homogeneous mixture with a solvent.
   • The property (of a problem or difficulty) that makes it possible to be solved. This is a figurative or abstract use, describing the quality of being solvable or resolvable.
   • A specific measured quantity: the amount of a particular substance that can dissolve in a given amount of a particular solvent at a specified temperature and pressure to produce a saturated solution. This is a quantitative expression of the property.

Usage and Examples

• Noun (Physical Property):
  • The solubility of sugar in water is very high.
  • Salt's solubility decreases at lower temperatures.
• Noun (Figurative Property):
  • The committee discussed the solubility of the political crisis.
• Noun (Quantitative Measure):
  • The solubility of this compound is 35 grams per 100 mL of water at 25°C.

Advanced Usage

• "Solubility product" (Ksp): A specific advanced chemistry term referring to the equilibrium constant for a solid substance dissolving in an aqueous solution. It is a special quantitative application of the concept.
  • Calculating the solubility product is essential for predicting precipitation reactions.
• "Mutual solubility": Refers to the degree to which two liquids are soluble in each other.
  • The mutual solubility of water and ethanol is complete.

Variants and Related Words

• Soluble (adj): Capable of being dissolved.
  • This powder is soluble in hot water.
• Insoluble (adj): Incapable of being dissolved.
  • Sand is insoluble in water.
• Solubilize (verb): To make soluble or to increase solubility.
  • The detergent helps to solubilize grease.

Synonyms

• Dissolvability: The capacity to dissolve (closest synonym for the physical property).
• Solvability: The quality of being solvable (closest synonym for the figurative property).

Related Phrases and Compounds

• Solubility curve: A graph showing how solubility changes with temperature.
  • The solubility curve for potassium nitrate is very steep.
• Solubility test: A procedure to determine if and how well a substance dissolves.
  • We performed a solubility test to identify the unknown compound.

Notes on Meaning

The core meaning of solubility is intrinsically linked to the process of dissolution. Its figurative use applies the logic of "dissolving a problem" to abstract concepts, implying they can be broken down and resolved. The quantitative meaning is a direct, measurable extension of the qualitative property.

Noun

1. the quality of being soluble and easily dissolved in liquid
2. the property (of a problem or difficulty) that makes it possible to solve
3. the quantity of a particular substance that can dissolve in a particular solvent (yielding a saturated solution)