Chapter 2 Changes In Matter Flashcards
What is a transformation?
Physical or Chemical change in matter
A physical change is a ….
Transformation that doesn’t change the nature of something.
What is a mixture?
2 or more substances are combined.
How many phases can a mixture have?
A mixture can have 1 or more phases.
Example
-Bowl of cereal has 2 phases
-Solid phase (cereal)
-Liquid phase (milk)
What are the 2 types of mixtures?
Homogenous and Heterogeneous mixtures
What are characteristics of Homogenous mixture?
Is made up of 2 or more substances that you cannot see just by looking at them.
-the properties are identical and are uniform.
-it has only 1 visible phase.
What are characteristics of Heterogeneous mixture?
Is made up of 2 or more substances that you can see by looking at them.
Substances are distributed in a non-uniform matter
-it has 2 or more phases
What is a solution?
a homogeneous mixture when 1 or more substances are dissolved in another substance.
What is a solvent?
Usually a liquid that dissolves in solute.
What is a solute?
A liquid, a solid or a gaseous substance that dissolves in another substance.
What is a solution?
A mixture of both substances
(Solute and Solvent)
What is an aqueous solution?
A solution that uses
water as a solvent.
-Solute = solid, liquid or gas
-only 1 visible phase
What are separation techniques used for?
To isolate contents of a mixture.
Name 2 separation techniques for homogenous mixtures
Evaporation
Distillation
Name 5 techniques of separating heterogeneous mixtures.
Filtration
Sedimentation
Decantation
Sieving
Centrifugation
