Science Flashcards
(23 cards)
What is a solution?
A homogeneous mixture of two or more substances.
True or False: A colloid can scatter light.
True
Fill in the blank: A suspension is a mixture where particles are _____ in a fluid.
suspended
What is the main characteristic of a colloid?
It contains particles that are larger than those in a solution but smaller than those in a suspension.
Which of the following is an example of a colloid? (a) Saltwater (b) Milk (c) Sand and water
b) Milk
True or False: In a suspension, the particles will eventually settle over time.
True
What is the Tyndall effect?
The scattering of light by particles in a colloid.
Fill in the blank: Solutions are made up of a solute and a _____.
solvent
What type of mixture is homogeneous and cannot be separated by filtration?
Solution
Which of the following is NOT a characteristic of a suspension? (a) Particles can be seen with the naked eye (b) Particles do not settle (c) Particles can block light
b) Particles do not settle
What is a common method to separate a suspension?
Filtration
True or False: Solutions can be solid, liquid, or gas.
True
What is the difference between a solute and a solvent?
A solute is the substance that is dissolved, while a solvent is the substance that does the dissolving.
Which of the following is an example of a solution? (a) Oil and water (b) Sugar water (c) Salad dressing
b) Sugar water
True or False: Colloids can be separated by centrifugation.
True
Fill in the blank: The particles in a _____ are too small to be seen and do not settle out.
colloid
What is the main difference between a colloid and a suspension?
Colloids have particles that remain evenly dispersed, while suspensions have larger particles that can settle out.
True or False: All colloids are liquids.
False
Which property is used to describe the ability of a substance to dissolve in another substance?
Solubility
What type of mixture contains particles that are larger than those in solutions but smaller than those in suspensions?
Colloid
Fill in the blank: In a _____, the dispersed phase does not settle out and cannot be filtered.
colloid
What is an emulsion?
A type of colloid formed when two immiscible liquids are mixed.
True or False: Solutions are typically clear and transparent.
True
