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5 Written questions

5 Matching questions

  1. Know functional group NAMES, MOLECULAR FORMULAS, and STRUCTURES!
  2. How many valence electrons does carbon have? How many single covalent bonds can it form?
  3. Draw functional group structure and give molecular formula for: Amino.
    Example?
  4. Organic molecules must always contain what?
  5. What is specific heat?
  1. a Carbon and Hydrogen
  2. b Amino (-NH₂) (acts as a base, amino acids); N single bonded to 2 H's

    H
    |
    −N
    |
    H

    Ex: Glycine
  3. c Resistance to change in temperature
  4. d 4 and 4
  5. e Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl

5 Multiple choice questions

  1. Small organic molecules with great effects:
    Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
  2. Solvent: Substance doing the dissolving (water)
    Solute: Substance being dissolved (sugar or salt)
    Solution: homogenous mixture (product of solvent & solute)
  3. WATER!
  4. Hydrogen bonds keep the molecules spread out, so they don't pack together, making them less dense.
    The floating ice insulates the body of water underneath it; if ice sank, then all the bodies of water would freeze solid, making life unlivable.
  5. Hydroxyl (polar, form hydrogen bonds, polar solvents)
    −OH (may be written HO-)
    Ex: Alcohols, such as Ethanol

5 True/False questions

  1. What are the molar concentrations of hydrogen and hydroxide ions in one liter of pure water?H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)

          

  2. 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

          

  3. Be able to calculate the molar concentrations of hydrogen and hydroxide ions from a given pH value or vice versa.Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².

          

  4. Draw functional group structure and give molecular formula for: Carboxyl.
    Example?
    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. What are emergent properties of water?Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)