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Out-of-class Assignment #4

  • Page ID
    70816
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    1. Calculate the pH of a solution prepared by adding 35 mL of 0.054 M sodium aspartate to 45 mL of 0.028 M aspartic acid hydrochloride.
    2. Starting with 30 mL of 0.1 M citric acid, calculate the initial pH and the pH at each 5 mL increment of 0.1 M NaOH until you are 10 mL past the last equivalence point. Plot the data and determine whether 99.9% of the citric acid has been neutralized at the last equivalence point. Also calculate the concentration of all species in solution at the second equivalence point.
    3. Calculate the pH of a 0.345 M solution of sodium glutamate.
    4. Calculate the pH of a 0.167 M solution of glycylglycine hydrochloride.
    5. Calculate the pH of a solution prepared by adding 8.76 grams of sodium hydrogen iminodiacetate to a 250 mL volumetric flask and diluting to the mark with water.
    6. Calculate the pH of a solution prepared by adding 18 mL of 0.111 M sodium EDTA to 26 mL of 0.036 M EDTA (Be careful that you have the right two species based on the naming procedure we have adopted).
    7. Starting with 30 mL of 0.1 M ethylenediamine, calculate the initial pH and the pH at each 5 mL increment of 0.1 M HCl until you are 10 mL past the last equivalence point. Plot the data and determine whether 99.9% of the ethylenediamine has been neutralized at the last equivalence point. Also calculate the concentration of all species in solution at the second equivalence point.
    8. Meet with your group to go over your answers to problems 1-7.

    This page titled Out-of-class Assignment #4 is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Thomas Wenzel.

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