Purchase Solution

Plotting a titration curve for Ala and His

Not what you're looking for?

Ask Custom Question

Here is the problem:

1. Assume you have a solution containing 0.1 mol of Ala adjusted to pH = 0.5 with HCl. You begin adding 1.0 M NaOH. Plot (do not sketch) the resulting titration curve (pH vs. moles NaOH added) showing all inflection points. Show your calculations and be sure to state your assumptions.

2. Plot a similar titration curve for a solution containing 0.1 mol of His at pH = 0.5. (pKa values: Ala: alpha-COOH = 2.3, alpha-NH2 = 9.7; His: alpha-COOH = 1.8, alpha-NH2 = 9.2, Imidazole = 6.0).

Purchase this Solution
Solution Summary

This solution includes plots of titration curves, including calculations.

Solution Preview

Please see attached document/graph/spreadsheet for your solution.

The OTAs on this web site are obliged not to create solutions for students that could be printed off and handed in if it were an assignment. Rather we are to provide highly instructional information that can aid in understanding of the question posed. I hope I can be of the kind of assistance you seem to be looking for, but I am glad you increased the number of units bid on this question and provided some further instructions for what you were after. A question like this could take anywhere from two to three (maybe even four) hours, to make sure we are certain we have the formulas correct, create a written response, do all calculations, check our work, etc. For 3 credits we get about $10, which at $5-$3/hr, is fair and acceptable to many Tas, but does not really reflect the time required or quality of the work. You seem to want a pretty comprehensive (daunting) treatment of the topic, for which a TA will require more time than usual.

Anyway, here goes. I've been trying to work on this response for awhile but the website has had some technical difficulties lately... my apologies. Your task is to explore the acid-base properties of ...

Purchase this Solution
Free BrainMass Quizzes
The Heart

This quiz test the understanding of the heart and some of its parts. It is important to understand how the heart functions and what makes it function.

Labor Comfort Measures

Do you know how to comfort someone in labor?

Parts of the Brain

This quiz will test your knowledge on different areas of the brain.

Pregnancy Knowledge

How much do you know about being pregnant? Test your Pregnancy IQ with this quiz!

Vision and Oculomotor Control

This quiz will test the student's knowledge of the neural underpinnings of the visual system and its central pathways.

View More Free Quizzes
Related BrainMass Solutions

  • titration curve

    (B) Plot a similar titration curve for a solution containing 0.1 mol of His at pH = 0.5. (pKa values: Ala: ?-COOH = 2.3, ?-NH2 = 9.7; His: ?-COOH = 1.8, ?- NH2 = 9.2, Imidazole = 6.0). Please see the attached file.

  • Equivalence volume of the second titration

    Generate a titration curve by plotting the pH on the y-axis and the number of mL of base added to the flask on the x-axis. How do you determine the equivalence volume of the titration from this curve?

  • EDTA-pY3+ titration plot

    A titration curve for Y3+-EDTA is plotted after calculating values.

  • Polypeptide Chain Structure & Function

    - ** ** Cys-Ala-Phe-His-Arg Solution goes through the chain to mark where bends and twists will be as well as identifying which amino acids may be inside a protein.

  • Titration Curves: Titration of Tyrosine

    Show: a) The pH value at each equivalence points and each 1/2 equivalence point b) The charge at each equivalence and 1/2 equivalence point c) The isoelectric point of the amino acid and give its value d) The approximate shape of the titration curve

  • Two Titration Equivalence Points

    Sol: Weak acid & Strong base (Example: NaOH added to acetic acid (CH3COOH)) The Curve begins at a higher acidic pH and ends at high basic pH. The pH change at the equivalence point (pH > 7 )is not so great.

  • Titration of 50 mL 0.108 M propanoic acid (HPr) with 0.150 M NaOH

    As well, it provides an example for understanding weak acid-strong base titration cases, an illustration of a titration curve demonstrating this and outlines why understanding this case may help solve the problem. 500 words.

  • Titration Calculations

    Describe how you would use the student's titration curve to determine the Ka for formic acid. Please refer to the attached file. Thank you for using BrainMass!

  • Action of Trypsin on Peptides

    a. Lys-Asp-Gly-Ala-Ala-Glu-Ser-Gly b. Ala-Ala-His-Arg-Glu-Lys-Phe-Ile c.

View More Related Solutions