Results 1 to 2 of 2

Thread: Can anyone help me clarify this titration problem?

  1. #1 Can anyone help me clarify this titration problem? 
    New Member
    Join Date
    Sep 2011
    I don't fully understand what I'm supposed to do. I know how to do the calculations, but the concept is what I don't get too much. We discussed standardization in that class. The directions of the assignment is:

    Below is assorted data from a theoretical titration that was completed and the possible solutions that were used. There are several titrations that could be theoretically done given the information below. Considering any TWO possible titrations:
    1) Given that the indicator used was phenolphthalein which substance was put in the burette and flask
    2) Make any relevant calculations.

    To sum up the data:
    Average volume used in 3 out of 6 trials ( other 3 were irrelevant ) = 12.66mL

    These were the acid-base that I found to match up: unknown + known

    0.1M Mg(OH)2 + 0.1323M H2SO4
    1M HCl + 1.005M KOH
    0.1M H2SO4 0.09875M KOH

    The volume of the substance in the flask was 10.0mL, and given that the indicator was phenolphthalein, the acid was in the flask.

    I calculated that 0.1323M H2SO4 + 0.1M Mg(OH)2 (ignoring the inaccurate molarity) the molarity of the magnesium hydroxide would've been 0.10441M (this is right, according to my teacher).

    So that would've been one match up. What's the other match up? I think, because it is standardization, I would have to use the new and more accurate molarity to calculate another match up with the other given unknown (which are both acid)?

    Calculating this, I found that 0.1M H2SO4 + 0.10441M Mg(OH)2 to be the closest match at = 0.1318M H2SO4 (under the same volumes as before).

    Was I doing it right?

    Reply With Quote  


  3. #2  
    Geo is offline
    Forum Junior
    Join Date
    Nov 2009
    New Zealand
    Use the same number of s.f. in your calculations?

    Reply With Quote  

Similar Threads

  1. Titration of an Amino Acid
    By Decessus in forum Chemistry
    Replies: 1
    Last Post: January 22nd, 2011, 12:36 PM
  2. Titration And The Periodic Table
    By shaunyp in forum Chemistry
    Replies: 0
    Last Post: October 11th, 2010, 10:06 PM
  3. Titration equivalence point?
    By MugBum in forum Chemistry
    Replies: 0
    Last Post: June 15th, 2010, 09:18 PM
  4. Calculus II Problem - some bridge problem!!
    By jgezau in forum Mathematics
    Replies: 11
    Last Post: August 3rd, 2008, 08:41 PM
  5. Titration
    By NimaRahnemoon in forum Chemistry
    Replies: 2
    Last Post: May 26th, 2006, 10:45 AM
Tags for this Thread

View Tag Cloud

Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts