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PH Buffer solution

  1. Jan 26, 2010 #1
    I have no idea how to find the pH of a buffer solution:
    Please step by step!
    Calculate the pH after 0.020 mol NaOH is added to 1.00 L of:
    a mixture containing 0.100 M HONH2 and 0.100 M HONH3Cl

    please step by step instruction so I can follow and do other problems on my own! Thanks
     
  2. jcsd
  3. Jan 26, 2010 #2
    its been a while but dont you just find the moles of each. then find out how many OH or H you have and find the ph like that? or was that not buffer?
     
  4. Jan 26, 2010 #3
    i don't believe that's how you do it
     
  5. Jan 26, 2010 #4

    Borek

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    Staff: Mentor

    Last edited by a moderator: Aug 13, 2013
  6. Jan 26, 2010 #5
    would the answer be 6.18?
     
  7. Jan 26, 2010 #6
    ahhh the henderson hasslebach i remember that one. Yeah you just have to use that equation with the mols of acid and base taht you have.
     
  8. Jan 26, 2010 #7

    Borek

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    Staff: Mentor

    Depends on what value you have used for pKa. Correct ball park for sure.
     
    Last edited by a moderator: Aug 13, 2013
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