Electrolytes and Boiling Point Elevation Quiz
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Questions and Answers

Why are crystalline solids considered as true solids?

  • because they behave as crystalline at a certain temperature.
  • because that can be molded and blown into various shapes.
  • because of their repeated pattern of arrangement. (correct)
  • because of its sharp melting point that once it reaches this point it will immediately change into liquid form.

    • Why are the solid-state and molten state of ionic crystals considered poor electrical conductors?

  • because their particles are NOT held firmly thus there is no enough space for the ions to move around which make them non-conductors of electricity.
  • because they have a definite heat of fusion that helps them to change their phase.
  • because their particles are held firmly thus there is no enough space for the ions to move around which make them as non-conductors of electricity. (correct)
  • because of delocalized electrons that can freely room across the entire metal.

    • What do plateaus in a heating and cooling curve of a substance imply?

  • all the solid substance is completely melted
  • a phase change occurs (correct)
  • temperature is in a constant value
  • kinetic energy is speeding

    • What does dynamic equilibrium mean?

    <p>a state where the forward and reverse reactions are occurring at the same rate, resulting in no net change over time.</p> Signup and view all the answers

    What is the definition of an electrolyte?

    <p>A compound that dissolves by breaking into ions and conducting electricity in solution</p> Signup and view all the answers

    Which term refers to the boiling point of a solution minus the boiling point of the pure solvent?

    <p>Boiling point elevation</p> Signup and view all the answers

    Which compound will cause the greatest increase in the boiling point when added to an aqueous solution?

    <p>2 moles of MgSO₄</p> Signup and view all the answers

    Which solution will show the smallest amount of freezing point depression?

    <p>C₆H₁₂O₆ (glucose)</p> Signup and view all the answers

    Which factor increases the rate of a chemical reaction?

    <p>Smaller particle size</p> Signup and view all the answers

    Which factor does NOT affect the rate of a chemical reaction?

    <p>Container shape</p> Signup and view all the answers

    What is the molarity of a 20.0% phosphoric acid (H3PO4) solution with a density of 1.12 g/mL?

    <p>2.7 M</p> Signup and view all the answers

    How many grams of Ag2CO3 are required to react completely with 28.5 mL of 1.00 M NaOH solution?

    <p>3.93 g</p> Signup and view all the answers

    Which property differentiates electrolytes from nonelectrolytes?

    <p>Electrolytes conduct electricity, while nonelectrolytes do not.</p> Signup and view all the answers

    Which of the following is a nonelectrolyte?

    <p>C2H5OH</p> Signup and view all the answers

    Which 0.1 M solution would have the lowest vapor pressure at 25°C?

    <p>Al(NO3)3 solution</p> Signup and view all the answers

    Which observation(s) reflect(s) colligative properties?

    <p>I and II only</p> Signup and view all the answers

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