Explore BrainMass

Explore BrainMass

    Titrating hydrochloric and acetic acids with NaOH

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    I would like to see the details of the calculations.
    For my lab experiment I have the following data:
    Titration 1:
    25.00mL of unknown concentration HCl
    2 drops of phenolpthalein to show end-point
    1.0M NaOH
    What is the molarity of the HCl?
    What is the Ka of the HCl?
    What is the equivalence point?
    What is the half-equivalence point?
    See attachment for titration details.

    Titration 2:
    5.00mL unknown concentration of acetic acid with 20.00 mL of H2O added and 2 drops of phenolpthalein to show end-point.
    1.0M NaOH
    What is the molarity of the acetic acid?
    What is the Ka of the acetic acid?
    What is the equivalence point?
    What is the half-equivalence point?
    See attachment for titration details.

    © BrainMass Inc. brainmass.com October 4, 2022, 12:09 am ad1c9bdddf
    https://brainmass.com/chemistry/acids-and-bases/75740

    Attachments

    Solution Preview

    Please see the attached file.

    Titration 1:
    Volume of NaOH 1.0M used = 15 (mL) - just before solution turns pink
    Number of mole of NaOH used =Molarity*volume=1*0.015= 0.015 (mol)
    The reaction between HCl and NaOH is:
    HCl + NaOH = NaCl + H2O
    Hence number of mole of HCl = Number of mole of NaOH = 0.015 (mol)
    Molarity of HCl =Mol/Volume=0.015/0.025 = 0.6 (M)

    For a strong acid such as HCl in this case, we just have to check in the literature for Ka value. I have found the following good reference with Ka (HCl) = 106
    http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch17/ph.php
    You ...

    Solution Summary

    The solution provides detailed explanations and calculation on the concepts of titration, weak acid dissociation and equilibrium.

    $2.49

    ADVERTISEMENT