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5 Written questions

5 Matching questions

  1. What are the different types of isomers (changes) and how are they different?
  2. Describe the terms: solvent, solute, and solution.
  3. What are the molar concentrations of hydrogen and hydroxide ions in one liter of pure water?
  4. What scale is pH?
  5. What are functional groups? Names?
  1. a Small organic molecules with great effects:
    Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
  2. b H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)
  3. c A log scale. Each change is 10 times. So when we go up or down, we add a zero to the end.
  4. d Solvent: Substance doing the dissolving (water)
    Solute: Substance being dissolved (sugar or salt)
    Solution: homogenous mixture (product of solvent & solute)
  5. e 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 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. Hydrophilic - attracted to water; polar or ionic; has charge
    Hydrophobic - repels water; nonpolar; no charge
  3. pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution
  4. Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
  5. 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 True/False questions

  1. What are primary producers?Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH

          

  2. Does form impact function?Resistance to change in temperature

          

  3. What two properties of water do plants take advantage of, to move water against gravity, explain?Yes. Ex: tiny tag from a functional group determines whether we are males or females

          

  4. How do acids and bases affect pH?Acids raise the concentration of H⁺ ions in an aqueous solution (decreases the pH number)
    Bases lower the concentration of H⁺ ions (increases the pH number)

          

  5. 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)

          

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