Chem HW - due 4/13/2015

posted Apr 2, 2015, 7:01 AM by ms.jun@fmhsnyc.org   [ updated Apr 2, 2015, 11:16 AM by FMHS Web Admin ]
  • If you would like to edit your ARTICLES, you must make your last edits by tomorrow (4/3/2015) night 11:59pm. I will start grading them after that time.
  • Finish Lab#15 - Norwegian Rain. You must have the new Purpose, Materials, Methods (for only titrating), Data (that was given to you), solve for Vb. Do not worry about the Data Analysis or the Discussion Questions.
  • Watch the following videos and answer the following questions. You may do this on a GoogleDoc or on loose-leaf. But, if you are doing this on a GoogleDoc, you MUST print out your copy to hand in.
    • Video 1 (CLICK) - REDOX REACTIONS
      • What are oxidation-reduction (redox) reactions? What is reduction? What is oxidation?
      • What subatomic particle is involved in oxidation and reduction reactions?
      • Describe the term "OILRIG".
      • How do you assign oxidation states/numbers? (WRITE DOWN THE RULES!)
      • Why don't we have permanent oxidation numbers for other elements in the Periodic Table?
      • Write down the chemical reaction equation for the Haber Process. Determine the oxidation states for each element in the reaction.
    • Video 2 (CLICK) - BATTERIES
      • What kind of chemistry is involved in batteries?
      • Describe the GALVANIC CELL. Draw the diagram and label its parts! Draw an arrow indicating the electron flow.
      • What is a SALT BRIDGE? Why is it important to have a SALT BRIDGE in the GALVANIC CELL?
    • Video 3 (CLICK) - PENNY BATTERIES
      • Describe how he constructed his battery the first time. Be specific on the materials and methods he used to create it.
      • Describe how he constructed his battery the second time. Be specific on the materials and methods he used to create it.
      • Why do you think he used zinc and copper? (Refer back to Video 2 for clues!)
    • Video 4 (CLICK) - LEMON BATTERIES
      • How can you create lemon/lime batteries?
    • Video 5 (CLICK) - HOW DO LEMON BATTERIES WORK?
      • How do lemon batteries work? Be specific!
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