Solutions & Colligative Properties
This type of mixture has solutes uniformly dispersed at the molecular level.
What is a solution?
This type of dispersion includes solutions and is uniform at the molecular level.
What is a molecular dispersion?
This is the science of the flow properties of matter.
What is rheology?
This dosage form contains insoluble solid particles dispersed throughout a liquid medium.
What is a suspension?
This dosage form contains small globules of one liquid dispersed throughout an immiscible liquid.
What is an emulsion?
This type of solution contains the maximum amount of dissolved solute at a given temperature.
What is a saturated solution?
This colloidal example is commonly found in a dessert.
What is Jell-O?
This property describes resistance to flow.
What is viscosity?
This preparation typically contains approximately 10–20% ethanol.
What is an elixir?
Desirable globule size for oral emulsions is smaller than this measurement.
What is 5 microns?
These four properties depend on the number of dissolved particles in a solution.
What are colligative properties?
This phenomenon describes the rapid, erratic movement of particles caused by molecular collisions.
What is Brownian movement?
This type of flow requires a yield value before the material begins flowing.
What is plastic flow?
This type of suspension is designed to provide controlled, delayed, or extended drug release.
What is a modified-release suspension?
This natural ingredient is used as an emulsifying agent.
What is acacia?
This combination of ingredients resists changes in pH after small amounts of acid or alkali are added.
What is a weak acid and conjugate base (or weak base and conjugate acid)?
According to Stokes' equation, increasing this property of a suspension vehicle slows sedimentation.
What is viscosity?
This type of surfactant carries a positive electrical charge.
What is a cationic surfactant?
Potassium sorbate (0.05-0.2%) and sodium benzoate (0.1%-0.3%) used in solutions and suspensions for this purpose.
What is a preservative?
This type of emulsion instability is irreversible.
What is breaking?
These two types of solutions can cause red blood cells to swell or shrink, respectively.
What are hypo-osmotic and hyper-osmotic solutions?
This electrical property measures particle charge within a dispersion; a higher value is associated with greater stability.
What is zeta potential?
This process allows surfactants to form micelles that help solubilize nonpolar drugs.
What is micellization?
This compounding step involves adding liquid to powder to create a smooth paste and reduce particle size.
What is levigation?
In the dry gum method, the emulsifier is triturated with this ingredient first.
What is oil?