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7 Written questions

6 Multiple choice questions

  1. 9.73
  2. pure water
  3. 3.57 cat. blue grape
  4. KNO3
  5. 0.0856
  6. 1.966

6 True/False questions

  1. What is the molar solubility of magnesium carbonate (MgCO3) in water? The solubility-product constant for MgCO3 is 3.5 x 10^-8 at 25C.KNO3

          

  2. Which of the following pairs cannot be mixed together to form a buffer solution? (2)KOH, HI

          

  3. The Henderson-Hasselbalch equation is __________.0.821 M HF and 0.909 M NaF

          

  4. In which one of the following solution is silver chloride the most soluble?0.0176 M NH3

          

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

          

  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