chemical properties september 18, 2012. chemical properties describe matter based on its ability to...

Chemical Properties

September 18, 2012

Chemical Properties

• Describe matter based on its ability to change into new matter that has different properties.

Flammability

• Is the ability of a substance to burn.

Reactivity

• Is the ability of two or more substances to combine and form one or more new substances.

• Ex: An iron nail can react with oxygen in the air to form iron oxide, or rust.

Chemical Change

• Happens when one or more substances are changed into new substances that have new and different properties.

• Evidence Maybe a:– Change in color

• Ex. Bananas ripening, copper turning green.

– Production of gas (bubbles form) • Ex- Vinegar & baking soda; bubbles in baked goods.

– Formation of a precipitate (a solid that forms and separates from a liquid) • Ex- curds in cottage cheese

Physical vs. Chemical

Demonstration:• http://cwx.prenhall.com/petrucci/chapter1/m

edialib/tutor/f20/0103.htm

Quiz:• http://www.edinformatics.com/math_science

/a_p_chem.htm

References

Holt Science & Technology:Physical Science. (2005). Orlando: Holt, Rhinehart, and Winston.

http://www.edinformatics.com/math_science/a_p_chem.htm

http://cwx.prenhall.com/petrucci/chapter1/medialib/tutor/f20/0103.html

http://antoine.frostburg.edu/chem/senese/101/matter/faq/physical-chemical.shtml

Homework

• Using Key Note, create a slide show depicting four examples of chemical changes.

• Remember to save the file on your desktop to Lastname_Title_Period ##_091812