Questions asked by Taashi

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• What is the pH of the solution which results from mixing 20.0mL of 0.50M HF(aq) and 50.0mL of 0.20M NaOH(aq) at 25 centigrades? (Ka of HF = 7.2 x 10^-4)
  
• The pH of aquous 0.10M pyridine (C6H5N) ion is 9.09. What is the Kb for this base?
  
• What's the equilibrium pH of an initially 0.64M solution of the monoprotic acid benzoic acid (HA) at #25^@ "C"# (Ka = 6.3 x 10^-5) ?
  
• What's the OH- concentration in 0.48M CH3CO2- (aq) (Kb of CH3CO2- is 5.6 x 10^-10)?
  
• Suppose 15.00 mL of 3.0 􀵈 10–6 M Fe(NO3)3 is added to 15.00 mL of 3.0 􀵈10–4 M KIO3. Will aprecipitate form? Explain why. For Fe(IO3)3, Ksp = 1.0 􀵈 10–14.
  
• If 30 mL of 0.10 M NaOH is added to 40 mL of 0.20 M HC2H3O2, what is the pH of the resulting solution at 25°C? Ka for HC2H3O2 is 1.8 x 10^–5 at 25°C.
  
• What is the concentration of silver(I) ion in a saturated solution of silver(I) carbonate containing 0.0024 M Na2CO3? For Ag2CO3, Ksp = 8.6 x 10^–12.
  
• What is the relationship between precipitate forming and ksp?
  
• Will a precipitate form?
  
• What is the Keq ? ?
  
• If 20 mL of 0.10 M KOH is added to 40 mL of 0.050 M HCOOH, what is the pH of the mixed solution at 25°C? Ka for HCOOH is 1.8 × 10^–4 at 25°C.
  
• 14.4 g sample of liquid ammonia is heated at a constant pressure of 1 atm from a temperature of 239.8 K to a temperature of 324.9 K. How much energy in kJ is required?
  
• What is the molecular weight they determined for this compound ?
  
• Buffer Solution Help ?????
  
• What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction?