What Makes a Compound Soluble? Understanding Solubility Factors Explained

Discover what makes a compound soluble, including the role of polarity, temperature, and pressure in solubility.

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A compound's solubility is primarily determined by the principle 'like dissolves like'. Soluble compounds are those that can form strong intermolecular attractions with the solvent. For example, ionic compounds are soluble in polar substances like water due to the electrostatic interactions between ions and polar molecules. In contrast, nonpolar compounds are soluble in nonpolar solvents because they can induce dispersion forces. The solubility of a compound also depends on temperature and, for gases, pressure.

FAQs & Answers

  1. What does 'like dissolves like' mean in chemistry? 'Like dissolves like' means that polar solvents typically dissolve polar compounds, and nonpolar solvents dissolve nonpolar compounds due to similar intermolecular forces.
  2. How does temperature affect the solubility of a compound? Increasing temperature generally increases the solubility of solids and liquids in solvents, but the effect on gases usually causes solubility to decrease.
  3. Why are ionic compounds soluble in water? Ionic compounds dissolve in water because water molecules are polar and can surround ions, stabilizing them through electrostatic interactions.

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