Multiple Choice
In general chemistry, a solution is defined as a homogeneous mixture. How many phases does a solution have?
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6. Chemical Quantities & Aqueous Reactions
Solutions
Multiple Choice
In the context of mixtures in chemistry, how is an emulsion different from a solution?
A
An emulsion consists of a solid dissolved in a liquid, whereas a solution consists of two immiscible liquids.
B
An emulsion contains only gases dissolved in liquids, whereas a solution contains only solids dissolved in liquids.
C
An emulsion is a colloid of one liquid dispersed in another (often stabilized by an emulsifier), whereas a solution is a homogeneous mixture at the molecular or ionic level.
D
An emulsion is always a homogeneous mixture, whereas a solution is always heterogeneous and separates on standing.
Verified step by step guidance1
Step 1: Understand the definition of a solution. A solution is a homogeneous mixture where the solute is dissolved at the molecular or ionic level in the solvent, resulting in a single-phase system with uniform composition throughout.
Step 2: Understand the definition of an emulsion. An emulsion is a type of colloid where tiny droplets of one liquid are dispersed throughout another liquid, often immiscible, and this dispersion is usually stabilized by an emulsifier to prevent separation.
Step 3: Compare the physical nature of solutions and emulsions. Solutions are clear and uniform because the solute particles are at the molecular or ionic scale, while emulsions appear cloudy or milky due to the larger droplet size of the dispersed phase.
Step 4: Note the stability differences. Solutions do not separate on standing because the solute is fully dissolved, whereas emulsions can separate over time unless stabilized by emulsifiers.
Step 5: Summarize the key distinction: an emulsion is a heterogeneous mixture of two immiscible liquids with one dispersed in the other as droplets, while a solution is a homogeneous mixture with solute particles completely dissolved at the molecular or ionic level.
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