Notes gb lab 07 chemical detective a
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Notes gb lab 07 chemical detective a Notes gb lab 07 chemical detective a Presentation Transcript

  • Notes
  •  The student will: Distinguish the difference between achemical and a physical change Investigate and understand physicalchanges in matter Investigate and understand chemicalchanges in matter Investigate and understand chemicalformulas and the types of bonds found insimple compounds
  • The Law of Conservation ofMass/MatterChemical ChangePhysical ChangeChemical FormulaChemical EquationReactantProduct
  • States thatmass/matter isneither lost orgained during areaction, thoughit may change insubstance, form,phase or state
  •  When a substancechanges its size orshape or phase/state ofmatter but still retainsthe properties of theoriginal substance i.e.:▪ Paper being torninto little pieces
  •  When a newsubstance is createdthrough thecombination ofchemicals or energy i.e.:▪ Paper burning andturning into ash(carbon)
  • The way asubstance orcompound isexpressedsymbolically▪CO2 is CarbonDioxide▪H2O is Water▪C6H12O6 isGlucose
  • A math-likeequation thatshows howchemicals arecombinedC + O2CO2▪ means“Yields”
  • The chemicalscombined in achemicalequationLocated on theleft side of theequationCarbon (C) + 2Oxygen atoms(O2)▪C + O2 CO2
  • The finaloutcome of achemical reactionLocated on theright side of theequation, (right ofthe yields symbol)C + O2  CO2▪Carbon (C )+ 2Oxygen atoms (O2)= Carbon Dioxide(CO2)
  • Activity Chemical list Clues to Change
  • Notes (Cont,)
  • Simply mixing materials does notalways produce a chemical change.There must be evidence of achemical change▪Measurable▪Observable
  • Same substance only in a different: Shape Size Phase/State of Matter▪ Solid▪ Liquid▪ Gas
  • A New substance mustbe formed!!!!!!!
  • One or more of theseoccurs
  • CCoolloorr CChhaannggee
  • Gas FormationGas Formation(Bubbles/Fizzing)(Bubbles/Fizzing)
  • Temperature ChangeTemperature Change(Increase/Decrease)(Increase/Decrease)
  • Precipitate FormationPrecipitate Formation▪An insoluble compound forms at thebottom