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Notes gb lab 07 chemical detective a

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Notes gb lab 07 chemical detective a

  1. 1. Notes
  2. 2.  The student will:  Distinguish the difference between a chemical and a physical change  Investigate and understand physical changes in matter  Investigate and understand chemical changes in matter  Investigate and understand chemical formulas and the types of bonds found in simple compounds
  3. 3. The Law of Conservation of Mass/Matter Chemical Change Physical Change Chemical Formula Chemical Equation Reactant Product
  4. 4. States that mass/matter is neither lost or gained during a reaction, though it may change in substance, form, phase or state
  5. 5.  When a substance changes its size or shape or phase/state of matter but still retains the properties of the original substance  i.e.: ▪ Paper being torn into little pieces
  6. 6.  When a new substance is created through the combination of chemicals or energy  i.e.: ▪ Paper burning and turning into ash (carbon)
  7. 7. The way a substance or compound is expressed symbolically ▪CO2 is Carbon Dioxide ▪H2O is Water ▪C6H12O6 is Glucose
  8. 8. A math-like equation that shows how chemicals are combined C + O2 CO2 ▪ means “Yields”
  9. 9. The chemicals combined in a chemical equation Located on the left side of the equation Carbon (C) + 2 Oxygen atoms (O2) ▪C + O2 CO2
  10. 10. The final outcome of a chemical reaction Located on the right side of the equation, (right of the yields symbol ) C + O2  CO2 ▪Carbon (C )+ 2 Oxygen atoms (O2) = Carbon Dioxide (CO2)
  11. 11. Activity Chemical list Clues to Change
  12. 12. Notes (Cont,)
  13. 13. Simply mixing materials does not always produce a chemical change. There must be evidence of a chemical change ▪Measurable ▪Observable
  14. 14. Same substance only in a different:  Shape  Size  Phase/State of Matter ▪ Solid ▪ Liquid ▪ Gas
  15. 15. A New substance must be formed!!!!!!!
  16. 16. One or more of these occurs
  17. 17. CCoolloorr CChhaannggee
  18. 18. Gas FormationGas Formation (Bubbles/Fizzing)(Bubbles/Fizzing)
  19. 19. Temperature ChangeTemperature Change (Increase/Decrease)(Increase/Decrease)
  20. 20. Precipitate FormationPrecipitate Formation ▪An insoluble compound forms at the bottom