Titrimetric Methods of Analysis Quiz
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Questions and Answers

What is the chemical substance being analyzed in the example given?

  • Water
  • Sodium hydroxide
  • Sodium chloride
  • Hydrochloric acid (correct)

    • What is the definition of titrimetric methods of analysis?

  • Analytical methods in which the volume of a solution of known concentration is consumed during the analysis.
  • Analytical methods that use a chemical indicator to determine the endpoint of a titration.
  • Analytical methods in which the amount of active constituent in a sample is measured by the volume of a titrant solution of known concentration. (correct)
  • Analytical methods that measure the amount of a substance by the addition of a titrant solution until an equivalence point is reached.

    • What is the difference between the stoichiometric point and the end point of a titration?

  • The stoichiometric point is the point where equivalent amounts of analyte and titrant have reacted, while the end point is the point where a sudden change in the reaction mixture is observed. (correct)
  • The stoichiometric point is the point where the titration begins, while the end point is the point where the titration ends.
  • The stoichiometric point and the end point are the same, as they both represent the point where equivalent amounts of analyte and titrant have reacted.
  • The stoichiometric point is the point where the titration is stopped, while the end point is the theoretical point where equivalent amounts of analyte and titrant have reacted.

    • What is the purpose of the indicator used in the titration?

    <p>To change the color of the reaction mixture at the equivalence point.</p> Signup and view all the answers

    What is the purpose of the buret used in a titration?

    <p>To add the titrant solution in a controlled and measured manner.</p> Signup and view all the answers

    What is the relationship between the analyte and the titrant in a titration?

    <p>The analyte and titrant react in a 1:1 stoichiometric ratio.</p> Signup and view all the answers

    What is the main purpose of a titration?

    <p>To determine the concentration of an unknown solution</p> Signup and view all the answers

    What is the difference between a direct titration and a residual titration?

    <p>Direct titrations involve a single reaction, while residual titrations involve two reactions.</p> Signup and view all the answers

    Why is it convenient to use equivalents in titrimetric analysis?

    <p>Equivalents allow you to directly relate the amounts of reactants and products in a chemical reaction.</p> Signup and view all the answers

    What is the relationship between the amount of a substance in grams and its equivalent amount?

    <p>The number of equivalents is equal to the number of moles divided by the substance's formula weight.</p> Signup and view all the answers

    How are the results of drug assays typically expressed?

    <p>In terms of %w/w, %w/v, and %v/v.</p> Signup and view all the answers

    What is the main reason that titrations are only feasible when the end point is very close to the theoretical stoichiometric point?

    <p>To minimize the error in the calculated analyte concentration.</p> Signup and view all the answers

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