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7 Written Questions

6 Multiple Choice Questions

  1. KOH, HI
  2. 1.966
  3. 7.54 (blue dog)
  4. KNO3
  5. pure water
  6. Elven 1.1

6 True/False Questions

  1. What is the pH of a buffer solution that is 0.211 M in lactic acid and 0.111 M in sodium lactate? The Ka of lactic acid is 1.4 x 10^-4.3.57 cat. blue grape


  2. Of the following solutions which has the greatest buffering capacity?0.0176 M NH3


  3. Calculate the pH of a solution prepared by dissolving 0.750 mol of NH3 and 0.250 mol of NH4Cl in water sufficient to yield 1.00 L of solution. The Kb of ammonia is 1.77 x 10^-5.9.73


  4. The pH of a solution prepared by mixing 50.0 mL of 0.125 M KOH and 50.0 ml of 0.125 M HCl is ________.1.966


  5. How many milliliters of 0.0850 M NaOH are required to titrate 25.0 mL of 0.0720 M HBr to the equivalence point?21.2


  6. A 25.0 ml sample of an HCl solution is titrated with a 0.139 M NaOH solution. The equivalence point is reached with 15.4 mL of base. The concentration of HCl is ______________ M.0.0856


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