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5 Written Questions

5 Matching Questions

  1. What two properties of water do plants take advantage of, to move water against gravity, explain?
  2. Do the functional groups have an impact on life? Give an example.
  3. What are the molar concentrations of hydrogen and hydroxide ions in one liter of pure water?
  4. What is the Universal Solvent?
  5. Draw functional group structure and give molecular formula for: Carboxyl.
    Example?
  1. a 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
  2. b Yes. Ex: tiny tag from a functional group determines whether we are males or females
  3. c WATER!
  4. d Cohesion and Adhesion.
    Cohesion - waters ability to stick to ITSELF (other water molecules)
    Adhesion - waters ability to stick to OTHER THINGS that are POLAR
  5. e H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)

5 Multiple Choice Questions

  1. Hydrophilic - attracted to water; polar or ionic; has charge
    Hydrophobic - repels water; nonpolar; no charge
  2. Organic molecules composed solely of Carbon and Hydrogen; Nonpolar covalent bond so they resist/repel water (ex: fat)
  3. Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
  4. Because it can bond to 4 other atoms (tetravalent - 4 valence electrons)

  5. (see p. 1 slide 4 in ch. 3)

5 True/False Questions

  1. What is a buffer?A log scale. Each change is 10 times. So when we go up or down, we add a zero to the end.

          

  2. Describe the terms: solvent, solute, and solution.WATER!

          

  3. Why is water in the solid phase less dense? How does this support life?Because it can bond to 4 other atoms (tetravalent - 4 valence electrons)

          

  4. Does form impact function?YES!

          

  5. Describe how and why hydrogen bonds form in water.
    (see p. 1 slide 4 in ch. 3)

          

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