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5 Written questions

5 Matching questions

  1. Be able to calculate the molar concentrations of hydrogen and hydroxide ions from a given pH value or vice versa.
  2. Why is carbon the basic building element of life?
  3. What is a buffer?
  4. Know functional group NAMES, MOLECULAR FORMULAS, and STRUCTURES!
  5. Draw functional group structure and give molecular formula for: Phosphate.
    Example?
  1. a Because it can bond to 4 other atoms (tetravalent - 4 valence electrons)
  2. b Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
  3. c Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH
  4. d Phosphate (−OPO₃²⁻) (acid: DNA, cell membrane, ATP); P double to O, single to O, 2 O⁻

    O

    −O−P−O⁻
    |
    O⁻

    Ex: glycerol phosphate
  5. e Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².

5 Multiple choice questions

  1. Waters specific heat is much higher that that of other solvents; this is because of hydrogen bonding; this keeps temperatures of places near/on bodies of water consistent
  2. Hydrogen bonds in water hold each other together stronger than they'd bond to the air, for example. Ex: Jesus Christ lizard can walk on water because of it's surface tension; a dragonfly has non-polar exoskeleton so water beads on it
  3. Fix C from atmospheric CO₂ (ex: Plants w/ photosynthesis)
  4. 1.) Structural - changes structural form; same formula, different structure
    2.) Geometric - differ in spatial arrangement due to inflexibility of double bond (two types: cis and trans) 3.) Enantiomers - mirror images of each other
  5. Hydroxyl (polar, form hydrogen bonds, polar solvents)
    −OH (may be written HO-)
    Ex: Alcohols, such as Ethanol

5 True/False questions

  1. Does form impact function?YES!

          

  2. How do acids and bases affect pH?Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH

          

  3. What is heat of vaporization? How does it relate to evaporative cooling? What affect does it have on living organisms?Waters specific heat is much higher that that of other solvents; this is because of hydrogen bonding; this keeps temperatures of places near/on bodies of water consistent

          

  4. What is specific heat?Resistance to change in temperature

          

  5. What is the pH scale?pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution

          

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