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