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Determining Ksp for Silver Sulfate

  1. Oct 29, 2008 #1
    1. The problem statement, all variables and given/known data
    Ok, to determine ksp we need to know the concentratison of Ag+2 and SO4-2


    2. Relevant equations
    to find ksp for calcium hydroxide we used titration


    3. The attempt at a solution
    i was thinking about evaporting it
    but im not sure if im right, help...
     
  2. jcsd
  3. Oct 30, 2008 #2

    Borek

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    Are you asked to desing the experiment? What analytical techniques are available to you?
     
  4. Oct 30, 2008 #3
    i am able to use anything
     
  5. Oct 30, 2008 #4

    Borek

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    What analytical techniques of determining concentration do you know?
     
  6. Nov 2, 2008 #5
    i dont understand what you are trying to immpply
     
  7. Nov 3, 2008 #6

    Borek

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    Nothing yet, so far I have just asked a question.

    To determine Kso you have to find out concentration of Ag+ and/or SO42- in the saturated solution. There are numeorus techniques that can be used, starting with classic - titrimetry, gravimetry, ending with instrumental methods - like spectroscopy or electrochemistry. Which of those do you know?
     
  8. Nov 3, 2008 #7
    Well for one experiment i did a titration lab to determine ksp, but for this lab my teacher was refeering to heating the silver sulfate... and im not sure what he is trying to say, so that is basically what i am asking, how can you determine the ksp for silver sulfate by eheating it ?
     
  9. Nov 3, 2008 #8

    Borek

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    No idea what he refers to, colud be that drying out is the idea - but IMHO it doesn't make sense. There is slighly below 1 mg of the solid per 1 mL of the solution, to get reasonable accuracy you will have to evaporated a lot of solution.
     
  10. Nov 3, 2008 #9
    alright suppose you do titration , which acid can you use?and why
     
  11. Nov 3, 2008 #10

    Borek

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    You can't use acid for titration in this case. There is no base that can be neutralized. Titration is not only for acid/base determination. There are methods - Mohr, Fajans - that can be used for silver determination, however, I don't think they will work here - silver concentration is too low.
     
  12. Nov 3, 2008 #11
    In this case what method would you use...
     
  13. Nov 3, 2008 #12

    Borek

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    Staff: Mentor

    Ion selective electrode sounds the most logical approach.
     
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