HONORS CHEMISTRY
August 23, 2011
Brain Teaser
PLACE HOMEWORK ON YOUR DESK
 Classify each of the following as a physical or
chemical property.
a. Iron and oxygen form rust.
b. Iron is more dense than aluminum.
c. Magnesium burns brightly when ignited.
d. Oil and water do not mix.
e. Mercury melts at -39 degree Celsius.
Agenda




Brain Teaser
Grade Worksheet
Notes: Classification of Matter and Separation
Techniques
Homework
 Study
for Element Quiz on Wednesday/Thursday (40
Elements)
 PowerPoint Presentation
Classification of Matter
Matter
Pure Substance
Element
Compound
Mixture
Heterogeneous
Homogeneous
Classification of Matter
Pure Substance Elements


Matter that can not be broken down into simpler
substances under normal lab conditions
Contains only one kind of atom
Atom


Molecule
Elements (symbols) Na, Au, C
Where can you find a list of all the elements?
Pure Substance Compounds

Can be separated into elements
+

Composed of two or more elements that combine in a chemical
reaction
+


Combine in a fixed proportion
Examples – NaCl, H2O, Fe(NO3)3
Which are elements and which are
compounds?
Mixtures

A blend of two or more pure substances
Not chemically combined

Composition of mixtures is variable

Granite
Mixtures
Heterogeneous


Mixture with visibly different parts.
A heterogeneous mixture is one that does not
blend smoothly throughout and in which the
individual substances remain distinct.
Sand + water
 Salt + Pepper
 M & M’s

Mixtures
Homogeneous

Mixture with no visibly different parts.
Sea water H2O + NaCl
 Air
N2 + O2 + CO2

Practice Classifying Matter

Make a list of 3 things (and their parts) found in the
classroom. Classify these as
solid, liquid, or gas
 pure substances and mixtures
 homogeneous or heterogeneous
 elements or compounds


Be prepared to share your classifications?
Classify




mixtures
pure substances
elements
compounds
Draw a picture that represents a pure compound.
Classify
Classify each of the following as, a homogenous or
heterogeneous mixture, pure substance, element or
compound, atom or molecule.
1.
CH4
2.
KMnO4
3.
Co
4.
Al + H2O
Draw atomic level pictures of each substance.
Review Questions
Identify each of the following as an
example of a homogeneous mixture or a
heterogeneous mixture.
A. a pile of rusty iron filings
B. 70% isopropyl rubbing alcohol
C. Saltwater
D. Gasoline
Review Questions
Identify each of the following as an
example of an element or a compound.
A. sucrose (table sugar)
B. the helium in a balloon
C. baking soda
D. a diamond
SEPARATION OF MIXTURES
Separation of Mixtures
No Chemical Change

Heterogeneous

Filtration

Seperate by size or state of matter
Separation of Mixtures

Homogeneous

Distillation


Crystallization


Using Different Boiling points
Evaporation or cooling with a solid
left behind
Chromatography

Solution flows along a stationary
substance
Filteration
Filtration is a technique that uses a porous
barrier to separate a solid from a liquid.
Distillation
When precisely controlled, distillation can
separate substances having boiling points that
differ by only a few degrees
Evaporation/Crystallization
•Crystallization is a separation technique that
results in the formation of pure solid particles of a
substance from a solution containing the dissolved
substance.
Chromotography
Chromotography
•The separation occurs because the various
components of the ink spread through the paper at
different rates.
Closure

Draw an atomic level picture of a mixture of
compounds.
Homework


Finish PowerPoint Presentation
Element Quiz (Wednesday/Thursday) – 1- 40