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7 Written questions

6 Multiple choice questions

  1. 7.54 (blue dog)
  2. hydrazoic acid
  3. 21.2
  4. RbOH, HBr
  5. pH= pKa + log [base]/[acid]
  6. Elven 1.1

6 True/False questions

  1. 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

          

  2. The pH of a solution prepared by mixing 45.0 mL of 0.183 M KOH and 65.0 ml of 0.145 M HCl is _________.7.00

          

  3. The addition of hydrofluoric acid and ________ to water produces a buffer solution.RbOH, HBr

          

  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 ________.7.00

          

  5. 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.1.9 x 10^-4

          

  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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