Solubility of Liquids in Liquids
- S-3-PHYSICAL-PHARMACEUTICS
- Feb 28
- 1 min read
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Binary Solutions
Binary Solutions: Solutions composed of two components (e.g., ethanol and water).
Miscibility: The ability of two liquids to mix in any proportion.
Types of Miscibility
Completely Miscible
Liquids mix in all proportions (e.g., ethanol and water).
Partially Miscible
Liquids mix in limited proportions, forming two layers at certain compositions (e.g., phenol and water).
Immiscible
Liquids do not mix (e.g., oil and water).
Ideal Solutions
Definition
Solutions that follow Raoult's Law across all concentrations.
Characteristics
No enthalpy changes upon mixing (ΔHmix = 0).
Volumes of the components are additive.
Intermolecular forces between unlike molecules are similar to those between like molecules.
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