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Please place Balancing Equations 101 out to be collected.

Please place Balancing Equations 101 out to be collected. Today’s Goal:. Explain the difference between. Physical Change and Chemical Change. Physical Change. A change in a substance that does not change the identity of the substance. Physical Change. Examples: Ice melting

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Please place Balancing Equations 101 out to be collected.

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  1. Please place Balancing Equations 101 out to be collected.

  2. Today’s Goal: • Explain the difference between Physical Change and Chemical Change

  3. Physical Change A change in a substance that does not change the identity of the substance.

  4. Physical Change • Examples: • Ice melting • Ripping paper in half • Mixing ice tea mix in water • Chewing your food

  5. Chemical Change A change in a substance that results in a new substance being formed.

  6. Chemical Change • Examples: • Burning a match • Cooking food • Rust forming • Digesting food

  7. Physical Change or Chemical Change ? You decide.. Baking a cake Chemical change The melting wax on a candle Physical change Putting salt on the icy sidewalk Physical change Burning the wick of a birthday candle Chemical change

  8. Physical Change or Chemical Change ? You decide.. Sawing a piece of wood Physical change Cutting your hair Physical change Bleaching your hair Chemical change Coloring in a coloring book Physical change

  9. Chemical changes create new substances. New substances are the result of a chemical reaction.

  10. Mg(s) + 2 HCl(aq) → MgCl2­(aq) + H2(g)

  11. Another example : Electrolysis of water produces new substances known as Hydrogen and Oxygen gas (H2) (O2) 2H2O(l) --> 2H2(g) + O2(g)

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