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CHEMISTRY: acid/base equilibrium

  1. May 27, 2008 #1
    1. The problem statement, all variables and given/known data
    Calculate the end point pH when 50 mL 0.2 mol/L HCl solution reacts exactly with 50 mL 0.2 mol/L NH3 (equivalent to NH4OH) solution.

    NH3 Kb=1.8x10^-5

    3. The attempt at a solution
    I have no idea how to even attempt this question. Can someone please help me? Thanks.
  2. jcsd
  3. May 28, 2008 #2


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    Staff: Mentor

    What is the composition of the solution at the end point? What ions are present? Only one them can change solution pH - which one?
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