Solutions, suspensions and colloids. Flashcards
(25 cards)
What is a solution?
A homogeneous mixture of two or more substances where one is dissolved in the other.
True or False: In a solution, the solute can be seen with the naked eye.
False
Fill in the blank: A solution consists of a solute and a _____.
solvent
What is a suspension?
A heterogeneous mixture in which solid particles are suspended in a liquid or gas.
True or False: Suspensions are stable and do not settle over time.
False
What is the main characteristic that distinguishes colloids from solutions?
Colloids have particles that are larger than those in solutions but smaller than those in suspensions.
Give an example of a colloid.
Milk or fog.
What is the Tyndall effect?
The scattering of light by colloidal particles.
Multiple Choice: Which of the following is NOT a characteristic of a solution? A) Uniformity B) Settling of particles C) Transparency
B) Settling of particles
What happens to the particles in a suspension over time?
They settle to the bottom due to gravity.
Fill in the blank: In a colloid, the dispersed phase is usually _____ than the continuous phase.
smaller
What is an emulsion?
A type of colloid formed when two immiscible liquids are mixed.
True or False: Solutions can be separated by filtration.
False
What type of mixture is blood classified as?
A colloid.
Multiple Choice: Which of the following is a characteristic of a suspension? A) Clear appearance B) Particles settle C) Homogeneous
B) Particles settle
What is the role of a solvent in a solution?
To dissolve the solute.
Fill in the blank: The particles in a colloid remain _____ and do not settle out.
suspended
What is a common method to separate a suspension?
Filtration.
True or False: Colloids can appear cloudy or translucent.
True
What is the difference between a solute and a solvent?
A solute is the substance being dissolved, while a solvent is the substance doing the dissolving.
What is an aerosol?
A colloid in which solid or liquid particles are dispersed in a gas.
Multiple Choice: Which of the following is a property of colloids? A) They can be filtered B) They do not scatter light C) They exhibit the Tyndall effect
C) They exhibit the Tyndall effect
What is a gel?
A colloid in which a liquid is dispersed in a solid.
Fill in the blank: Solutions have a _____ composition.
uniform
