Chemistry Merit Badge

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Chemistry Merit Badge

• Welcome to the Boy Scouts of America Chemistry
  Merit Badge ProgramDay One Learning and Lab

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Introductions and Program Outline

• Mrs. Linda Bennett, Chemistry Teacher, Naperville
  Central H.S.
• Mrs. Tracy Mitchell, Tutor/Mentor, Owner TutorA2Z
• Chemistry and the Methods of Science
• Matter/Mixtures Physical Properties and Changes
• Matter/Compounds Chemical Properties and
  Changes
• MSDS Revealed! (Safe Chemical Handling Storage)
• Phosphates, the cleaner cleaner?
• Chemistry Careers and Regulatory Agencies
  (Jeopardy)
• Lab Safety, then Iron Nail and Cartesian Diver
  Labs

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So What, Exactly IS Chemistry?
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Lets Test Your Scientific Reasoning!
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Matter Its Everywhere!

• Pure Substances
• Elements
• Compounds
• These bond CHEMICALLY to form other/new
  compounds.
• Compounds must be separated chemically

• Mixtures
• Heterogeneous
• Homogeneous
• These combine only physically
• Mixtures can be separated physically

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Separating Mixtures

• Using screens or sifters (based on particle size)
• Filtration (using filter paper also particle
  size)
• Extraction/Manual separation (hands, magnets,
  etc.)
• Chromatography (separate pigment using
  solubility)
• Distillation/Evaporation (heat to boiling points)
• http//www.metacafe.com/watch/723941/solar_water_d
  istiller/

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P/C Properties vs. Changes
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Physical vs. Chemical Properties

• Physical Properties can be observed without
  changing the substance!
• Color and texture
• Freezing Point
• Boiling Point
• Hardness
• Density

• Chemical Properties cant be observed without
  changing the substance!
• Chemical reactivity
• Flammability orCombustibility

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Physical vs. Chemical Changes

• Physical Changesdo not make anything new. No
  bonds are broken or reformed.
• Crushing
• Cutting or Tearing
• Melting/Freezing

• Chemical Changesbreak and reform chemical
  bonds. New products are formed!
• Burning/Combusting
• Digesting
• Decomposing
• Fermenting

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Type of Change How Can You tell?

• Physical Changes leave you with pretty much your
  starting substance. Size/shape may change, it may
  melt or freeze, but overall you have what you
  had!
• In a chemical change youll see EVIDENCE like
• Bubbling or fizzing (gas evolved!)
• Formation of a solid precipitate
• Evolution of heat or light (without you adding
  energy)
• Unexpected color change (two clear liquids turn
  red)
• Change in smell or taste

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Sample Reactions

• Physical Changes
• http//www.youtube.com/watch?vOC-TnJuSezk
  (tearning)
• http//www.eepybird.com/dcm1.html (Diet Coke and
  Mentos Fountain)
• http//www.youtube.com/watch?vaC-KOYQsIvU
  (Heating Pad Gone Wild!)
• Chemical Changes
• http//www.youtube.com/watch?vQSZ-3wScePM
  (alkali metals and water)
• http//www.youtube.com/watch?v-DjCum6yu8M
  (Whoosh Bottle)
• http//www.youtube.com/watch?v085e-ALKmUM
  (Elephant Toothpaste)
• http//www.willitblend.com/videos.aspx?typeunsafe
  videoglowsticks

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Any Ideas Why Its Called Periodic?
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MSDS Revealed Chemical Safety!

• As a group look at the MSDS Sheets for the
  products in your folder and on the products
  around the room.
• Be prepared to share/discuss the similarities and
  the differences on the information regarding
• Toxicity
• Safe handling and storage
• Proper disposal

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Phosphates The Good, the Bad and the Bubbly!
Would you brush your teethwith fertilizer?!
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Careers in Chemistry and US Agencies
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Your Tasty Homework Assignment!
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Information for Day Two

• We will see you again at "National Chemistry
  Day,"
• Saturday, October 25, 2008, 930 am to ???at
  Loyola University of ChicagoFlanner Hall -
  Loyola Lake Shore Campus
• You will interview a minimum of
  THREEprofessionals working in Chemistry, after
  which you will have completed your chemistry
  merit badge requirements!

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Lab Safety Essentials
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Lab Safety Videos

• http//www.youtube.com/watch?vhv9imJzZWrY
• http//www.youtube.com/watch?vAI6vgblvuDg
• http//www.youtube.com/watch?vuwlsjH4V63w
• http//www.youtube.com/watch?vM1h7rIz2CD4
• http//www.youtube.com/watch?vdjpZa7OdFuc
• http//www.youtube.com/watch?vKn5XfHHED9c
• http//www.youtube.com/watch?v6a0uEvoWqAs
• http//www.youtube.com/watch?v6iINcQmsfoE
• http//www.youtube.com/watch?vPaVkZSGw8mU
• http//www.youtube.com/watch?vz21y9Gijb9M
• http//www.youtube.com/watch?vJAzsKc0zlLc
• http//www.youtube.com/watch?vz_J9wMSbkZI
• http//www.youtube.com/watch?vyCPMDrUplU0

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Preparing for Your Labs