10 Questions
What is the definition of a phase in a system according to the pharmaceutical sciences?
A distinct homogeneous part of a system separated by definite boundaries from other parts of the system.
What is dispersion in the context of pharmaceutical sciences?
Dispersion is a mixture of two substances, one of which (dispersed phase) is distributed in form of subdivided particles throughout another substance (continuous phase, dispersion medium).
How is a pharmaceutical dispersion classified?
A pharmaceutical dispersion is classified based on the size of the dispersed phase and not its composition.
What is a molecular dispersion in the context of pharmaceutical sciences?
A molecular dispersion is a true solution of a solute phase in a solvent where the dispersed phase completely dissolves, homogeneously distributed throughout the dispersion medium, cannot scatter light, and cannot be vis.
What are the two types of pharmaceutical mixtures (or dispersions) mentioned in the text?
The two types are molecular dispersions and coarse dispersions.
Match the following terms with their definitions in pharmaceutical sciences:
Phase = A distinct homogeneous part of a system separated by definite boundaries from other parts of the system Dispersion = A mixture of two substances, one of which is distributed in form of subdivided particles throughout another substance Molecular dispersion = A true solution of a solute phase in a solvent, where the dispersed phase completely dissolves and is homogeneously distributed throughout the dispersion medium System = A bounded space or an exact quantity of a material substance
Match the following terms with their descriptions in pharmaceutical sciences:
Dispersion medium = The substance throughout which the dispersed phase is distributed in the form of subdivided particles Continuous phase = The substance in which the dispersed phase is distributed throughout as subdivided particles Subdivided particles = Particles of the dispersed phase that are distributed throughout the dispersion medium Solute phase = The dispersed phase that completely dissolves and is homogeneously distributed throughout the dispersion medium
Match the following terms with their examples in pharmaceutical mixtures:
Molecular dispersion = True solution of a solute phase in a solvent Coarse dispersion = Pharmaceutical mixture where the size of the dispersed phase is considered, not its composition Dispersion = Mixture of two substances, one of which is distributed in form of subdivided particles throughout another substance System = Bounded space or an exact quantity of a material substance
Match the following terms with their primary usages in pharmaceutical sciences:
Dispersion = Mixing of two substances, one of which is distributed in form of subdivided particles throughout another substance Molecular dispersion = True solution of a solute phase in a solvent Coarse dispersion = Pharmaceutical mixture where the size of the dispersed phase is considered, not its composition Phase = Distinct homogeneous part of a system separated by definite boundaries from other parts of the system
Match the following terms with their primary considerations in classifying pharmaceutical dispersions:
Size of the dispersed phase = The primary consideration in classifying a pharmaceutical dispersion Composition of the dispersed phase = Not considered in classifying a pharmaceutical dispersion Material substances = Can be mixed together to form a variety of pharmaceutical mixtures Dispersion medium = The substance throughout which the dispersed phase is distributed in the form of subdivided particles
Test your knowledge of nonelectrolytes in pharmaceutical sciences with this quiz. Explore the concepts of systems, phases, and dispersed systems as they relate to pharmaceutical substances.
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