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Please Help Volumetic Analysis - calculate concentration

  1. Jul 4, 2012 #1
    Please Help!! Volumetic Analysis - calculate concentration

    Dear Physics Forum Fiends,

    I was wondering if anyone out there who needs to earn some extra points to get into heaven perhaps or is simply feeling extraordinarily generous, might like to give this problem a go?
    I am woefully lost in chemistry!

    1. The problem statement, all variables and given/known data

    A 25.00mL sample of 'Cloudy Ammonia' was diluted to a volume of 250.00mL in a volumetric flask. A 25.00mL aliquot of the diluted solution was titrated with 0.200 M hydrochloric acid. To reach the end point, 26.75 mL of acid was required.
    Calculate the concentration of ammonia in the cloudy ammonia.


    2. Relevant equations

    NH3 + HCl > NH4Cl
     
  2. jcsd
  3. Jul 5, 2012 #2

    Simon Bridge

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    Re: Please Help!! Volumetic Analysis - calculate concentration

    Welcome to PF:
    This is an acid-base titration calculation ... from the look of it, this is part of a course so you should find examples in your course notes. Failing that - there are many many online.

    Give the calculation an honest try and we'll help you out where you get stuck.
     
  4. Jul 5, 2012 #3
    Re: Please Help!! Volumetic Analysis - calculate concentration

    Hello,

    Thank you for your reply. I just got some help from somewhere else which has helped me to understand whats going on a lot better.

    Thanks,
     
  5. Jul 5, 2012 #4
    Re: Please Help!! Volumetic Analysis - calculate concentration

    ...but I really appreciate your offer of assistance!

    Best wishes,
     
  6. Jul 5, 2012 #5

    Simon Bridge

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    Re: Please Help!! Volumetic Analysis - calculate concentration

    No worries.
    In case someone else googles to this page with a similar question, here's a link to an explanation.
     
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