Chemical Properties And Changes

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Information about Chemical Properties And Changes

Published on February 9, 2008

Author: sth215

Source: slideshare.net

Chemical Properties and Changes

Do you remember what Physical Properties are??? Color Shape Mass State of Matter Length Magnetism

Color

Shape

Mass

State of Matter

Length

Magnetism

Chemical Properties determine how a substance interacts with other substances Some examples are: *flammability *reactivity to an acid *reactivity to water

After a PHYSICAL CHANGE, the appearance of the substance may be different but it is still the same substance EXAMPLES: Cutting a steak Cracking an egg Chopping wood Bending a metal Tearing paper

EXAMPLES:

Cutting a steak

Cracking an egg

Chopping wood

Bending a metal

Tearing paper

After a CHEMICAL CHANGE, a new substance is produced with NEW PROPERTIES. These properties are different from the original substance! EXAMPLES: Burning wood Frying an egg Digesting a steak Rusting of metal

EXAMPLES:

Burning wood

Frying an egg

Digesting a steak

Rusting of metal

Here are some signs that a CHEMICAL CHANGE took place: New color New odor or smell Gas bubbles or smoke An increase or decrease in temperature

Here are some signs that a CHEMICAL CHANGE took place:

New color

New odor or smell

Gas bubbles or smoke

An increase or decrease in temperature

Physical or Chemical??? Use the A-F cards to separate the Physical Changes from the Chemical Changes! A. You cut a sheet of aluminum foil in half B. Your friend melts some butter for her popcorn C. Your Mom lights a candle in a dark room D. Rubbing alcohol evaporates from your hand E. Hydrogen peroxide bubbles when you put it on a cut on your leg F. You leave the milk on the counter all night and discover it has soured in the morning

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