Understanding Chemical Reactions

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Understanding Chemical Reactions

• Physical Science
• Chapter 10.1
• Part 1

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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

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Your Turn

• What is the indication of a chemical reaction in
• Glow stick
• Toe warmer
• Alka Seltzer
• Rust

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Products and reactants

• 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

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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!

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Chemical Equations

• Understanding a chemical equation
• Conservation of mass
• Demonstrating conservation of mass

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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?

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Activity

• Names of compounds worksheet due at end of class