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5 Written questions

5 Matching questions

  1. Be able to recreate hydrogen bonding in water.
  2. What is a hydrocarbon? Polar or non-polar?
  3. Organic molecules must always contain what?
  4. What is specific heat?
  5. Know functional group NAMES, MOLECULAR FORMULAS, and STRUCTURES!
  1. a Carbon and Hydrogen
  2. b Resistance to change in temperature
  3. c Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
  4. d
    (see p. 1 slide 4 in ch. 3)
  5. e Organic molecules composed solely of Carbon and Hydrogen; Nonpolar covalent bond so they resist/repel water (ex: fat)

5 Multiple choice questions

  1. 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. Solvent: Substance doing the dissolving (water)
    Solute: Substance being dissolved (sugar or salt)
    Solution: homogenous mixture (product of solvent & solute)
  3. Hydrophilic - attracted to water; polar or ionic; has charge
    Hydrophobic - repels water; nonpolar; no charge
  4. 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
  5. Because it can bond to 4 other atoms (tetravalent - 4 valence electrons)

5 True/False questions

  1. Draw functional group structure and give molecular formula for: Amino.
    Example?
    Carbonyl (>CO) (ketones, aldehydes, sugars); C double bonded to O

    O

    −C
    |

    Ex: Acetone, the simplest ketone

          

  2. Draw functional group structure and give molecular formula for: Methyl.
    Example?
    Amino (-NH₂) (acts as a base, amino acids); N single bonded to 2 H's

    H
    |
    −N
    |
    H

    Ex: Glycine

          

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

          

  4. 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.

          

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

          

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