Understanding Chemical Reactions Physical Science Chapter 10 1

Understanding Chemical Reactions Physical Science Chapter 10. 1 Part 1

Chemical changes rearrange chemical bonds Chemical changes ◦ Versus physical changes ◦ Change one or more substances into different substances Using chemical changes ◦ To make new substances Recognizing chemical changes ◦ ◦ Bubbles Temperature change Color change Precipitate

Your Turn What is the indication of a chemical reaction in: ◦ Glow stick ◦ Toe warmer ◦ Alka Seltzer ◦ Rust

Products and reactants ◦ Products on right side ◦ Reactants on left side Products may change phase in a reaction ◦ Liquid + liquid may not produce a liquid Start by counting the atoms in the products ◦ Chemical reactions to not create or destroy matter ◦ All atoms in the reactants must be identified in the produce

The products of the reaction Figuring out the products ◦ Chemical reactions rearrange atoms from the reactants to make the product ◦ No new atoms are created!

Chemical Equations Understanding a chemical equation Conservation of mass Demonstrating conservation of mass

Your Turn Partner 1: Say one thing a chemical equation tells you Partner 2: Add to their statement Partner 1: Can you add anything to that?

Activity Names of compounds worksheet – due at end of class