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 Mixture

Element Compound 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 atomAtom 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

MixturesHeterogeneous 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

MixturesHomogeneous 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?

ClassifyClassify

mixtures pure substances elements compounds

Draw a picture that represents a pure compound.

ClassifyClassify

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 anexample of a homogeneous mixture or aheterogeneous mixture.A. a pile of rusty iron filingsB. 70% isopropyl rubbing alcoholC. SaltwaterD. Gasoline

Review Questions

Identify each of the following as anexample of an element or a compound.A. sucrose (table sugar)B. the helium in a balloonC. baking sodaD. 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 Using Different Boiling points

Crystallization 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

•The separation occurs because the various components of the ink spread through the paper at different rates.

Chromotography

Closure

Draw an atomic level picture of a mixture of compounds.

Homework

Finish PowerPoint Presentation Element Quiz (Wednesday/Thursday) – 1-

40