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5 Written questions

5 Matching questions

  1. Draw functional group structure and give molecular formula for: Carboxyl.
    Example?
  2. What two properties of water do plants take advantage of, to move water against gravity, explain?
  3. Draw functional group structure and give molecular formula for: Hydroxyl.
    Example?
  4. Describe the terms: solvent, solute, and solution.
  5. What is the pH scale?
  1. a Cohesion and Adhesion.
    Cohesion - waters ability to stick to ITSELF (other water molecules)
    Adhesion - waters ability to stick to OTHER THINGS that are POLAR
  2. b pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution
  3. c Carboxyl (-COOH) acidic properties, components of many biologically important molecules; C double bonded to O and single to OH

    O

    −C
    |
    OH

    Ex: Formic acid or acetic acid
  4. d Solvent: Substance doing the dissolving (water)
    Solute: Substance being dissolved (sugar or salt)
    Solution: homogenous mixture (product of solvent & solute)
  5. e Hydroxyl (polar, form hydrogen bonds, polar solvents)
    −OH (may be written HO-)
    Ex: Alcohols, such as Ethanol

5 Multiple choice questions

  1. Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
  2. WATER!
  3. 4 and 4
  4. H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)
  5. 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 True/False questions

  1. How does waters specific heat compare to other solvents specific heat? What properties does it have that allows this? What affect does this have on the climate?Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)

          

  2. Does form impact function?YES!

          

  3. Describe surface tension and give an example relating to living organisms.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

          

  4. What are the differences between a hydrophilic and hydrophobic substance?Hydrophilic - attracted to water; polar or ionic; has charge
    Hydrophobic - repels water; nonpolar; no charge

          

  5. Draw functional group structure and give molecular formula for: Phosphate.
    Example?
    Phosphate (−OPO₃²⁻) (acid: DNA, cell membrane, ATP); P double to O, single to O, 2 O⁻

    O

    −O−P−O⁻
    |
    O⁻

    Ex: glycerol phosphate