UNIT 1 CHEMISTRY (2.1) Chemical Reactions (p )

BIG IDEAS Chemicals react with one another in predictable ways. Chemical reactions are a necessary component of chemical products and processes used in the home and workplace.

Chemical Change (Reaction) A change in matter that produces new substances with new properties. Example:

Physical Change A change in which no new substances are produced. The substance simply changes its appearance. Example:

Chemical Reactions Reactants the starting materials in a reaction. Products the new materials formed in a reaction.

Chemical Equation Describes a chemical reaction reactants  products Note: The symbol (  ) can be read as yields or forms or produces

Chemical Equation Example: magnesium + oxygen  magnesium oxide what reacts what is produced (reactants) (products)

Chemical Reactions of Life Photosynthesis carbon dioxide + water  glucose + oxygen CO 2 + H 2 O  C 6 H 12 O 6 + O 2 Cellular respiration Glucose + oxygen  carbon dioxide + water C 6 H 12 O 6 + O 2  CO 2 + H 2 O

Copyright © 2010 McGraw-Hill Ryerson Ltd. Chemical Reactions at Home and at Work Many different chemical products are found in your home, including cleaners, foods, and food ingredients. All of these products are produced using chemical reactions or are used to make chemical reactions happen. Vinegar is a common household chemical that is produced by diluting (watering down) acetic acid. As shown on the left, this chemical is used to make a variety of products.

Activity 2.1 Inflating a Balloon(p113)

CLASSWORK (2.1) Review Answer #1 and 2 on pg. 117 of your text Handout: PHYSICAL VS. CHEMICAL CHANGE HOMEWORK