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7 Written questions

6 Multiple choice questions

  1. 0.0176 M NH3
  2. 1.9 x 10^-4
  3. KOH, HI
  4. pH= pKa + log [base]/[acid]
  5. NaF
  6. RbOH, HBr

6 True/False questions

  1. Determine the Ksp for magnesium hydroxide (Mg(OH)2) where the solubility of Mg(OH)2 is 1.4 x 10^-4 M.1.9 x 10^-4


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


  3. The molar solubility of _________ is not affected by the pH of the solution/NaF


  4. Of the following solutions which has the greatest buffering capacity?0.821 M HC2H3O2 and 0.713 M NaC2H3O2


  5. 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


  6. A solution is prepared by dissolving 0.23 mol of hydrazoic acid and 0.27 mol of sodium azide in water sufficient to yield 1.00 L of solution.The addition of 0.05 mol of NaOH to this buffer solution causes the pH to increase slightly. The pH does not increase drastically because the NaOH reacts with the __________ present in the buffer solution. The Ka of hydrazoic acid is 1.9 × 10-5.hydrazoic acid


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