Transcript mixture
Do Now: Write down three examples of physical changes.
Music: Rush – Tom Sawyer
Book Section: 2.2
Classifying Matter
A pure substance is a
single component with
unique chemical
properties.
Ex: ethanol, water, any
element or compound
A mixture is a blend of
two or more components.
A mixture can either be
classified as
homogeneous or
heterogenous.
Classifying Matter
Homogeneous mixtures
– can not tell components
from each other.
Also called solutions
Examples: broth, plain
yogurt, salt water
Heterogenous mixtures
– can tell the components
apart
Exampes: salad, Italian
salad dressing, oil &
vinegar
Demo: Oil/Vinegar,
sugar water
Classification of Matter
Classification of Matter
Classification of Matter
Classification of Matter
Classification of Matter
Separation of Mixtures
Distillation uses
differences in boiling
points to boil and recondense liquids from
each other.
Equipment Show &
Tell: Condenser,
Distiller.
Separation of Mixtures
In filtration, solid
substances are separated
from liquids and
solutions.
Show & Tell: Filtration
Setup
Separation of Mixtures
Chromatography separates substances on the basis
of differences in solubility in a solvent.
Heterogenous or Homogenous?
Food coloring
Ice cubes in liquid water
Mouthwash
Mashed, unpeeled potatoes
Heterogenous or Homogenous?
Food coloring - homogenous
Ice cubes in liquid water - heterogenous
Mouthwash - homogenous
Mashed, unpeeled potatoes - heterogenous
Homework 1-6 Due Tomorrow!
This week:
Thursday – Elements and Compounds (2.3) – HW 1-6
Due
Friday – Chemical Reactions & Conservation of Mass
(2.4) – HW 1-7 Due
Unit 1 Test – Thursday, September 16