Acid & Base titration test question-2.docx - Acid\/Base Titration Test Question 1 Hydrocyanic acid(HCN is a weak acid and has the equilibrium

Acid & Base titration test question-2.docx - Acid/Base...

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Acid/Base Titration Test Question 1. Hydrocyanic acid (HCN) is a weak acid and has the equilibrium constant of K a = 4.9 x 10 -10 . A 0.500 liter solution of 0.500 M HCN at 25°C was prepared. a) Write the equilibrium equation for hydrocyanic acid. b) Calculate the initial pH of this solution. c) For a hydrocyanic acid and sodium cyanide buffer solution to have a pH of 4.97, what molar ratio of NaCN to HCN is needed? d) To 0.250 liters of the original HCN solution, 1.00 gram of potassium cyanide (KCN) was
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  • Fall '15
  • Calleros
  • pH, Hydrogen cyanide, potassium cyanide, hydrocyanic acid

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