Please hep with 1-3. thanks1.In the laboratory, a general chemistry student measured the pt of a 041 M aqueous solution of hydrocyanic acid to be 4.891.Use the information she obtained to determine the K, for this acid.K,(experiment)-(In the laboratory, a general chemistry student measured the pH of a 0.582 M aqueous solution of hydrofluoric acid to be 1.704.Use the information she obtained to determine the K, for this acid.K,(experiment) =3.In the laboratory, a general chemistry student measured the pH of a 0.474 M aqueous solution of hydrecyanic acid to be 4.879.Use the information she obtained to determine the K, for this acid.K,(experiment) = [2.

Ka is the acid dissociation constant. pH = -log[H+]

Please hep with 1-3. thanks 1. In the laboratory, a general chemistry student measured the pH of a 44I M aqueous solution of hydrocyani Use the information she obtained to determine the K, for this acid. K,(experiment)-( In the laboratory, a general chemistry student measured the pH of a 0.582 M aqueous solution of hy Use the information she obtained to determine the K, fer this acid. K,(experiment)- 3. 2.

Please hep with 1-3. thanks 1. In the laboratory, a general chemistry student measured the pH of a 44I M aqueous solution of hydrocyani Use the information she obtained to determine the K, for this acid. K,(experiment)-( In the laboratory, a general chemistry student measured the pH of a 0.582 M aqueous solution of hy Use the information she obtained to determine the K, fer this acid. K,(experiment)- 3. 2.

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter13: Acids And Bases

Section: Chapter Questions

Problem 9RQ: What is a salt? List some anions that behave as weak bases in water. List some anions that have no...

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You have a solution of the weak acid HA and add some of the salt NaA to it. What are the major species in the solution? What do you need to know to calculate the pH of the solution, and how would you use this information? How does the pH of the solution of just the HA compare with that of the final mixture? Explain.
Calculate the pH of 0.500 L of a buffer solution composed of 0.50 M formic acid (HCO2H) and 0.70 M sodium formate (NaHCO2) before and after adding 10.0 mL of 1.0 M HCl.
What is a salt? List some anions that behave as weak bases in water. List some anions that have no basic properties in water. List some cations that behave as weak acids in water. List some cations that have no acidic properties in water. Using these lists, give some formulas for salts that have only weak base properties in water. What strategy would you use to solve for the pH of these basic salt solutions? Identify some salts that have only weak acid properties in water. What strategy would you use to solve for the pH of these acidic salt solutions? Identify some salts that have no acidic or basic properties in water (produce neutral solutions). When a salt contains both a weak acid ion and a weak base ion, how do you predict whether the solution pH is acidic, basic, or neutral?
Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the equation: HMOaqH+aq+MO-aqredyellow If methyl orange is added to distilled water, the solution turns yellow. If 1 drop or two of 6 M HCl is added to the yellow solution, it turns red. If to that solution one adds a few drops of 6 M NaOH, the color reverts to yellow. a. Why does adding 6 M HCl to the yellow solution of methyl orange tend to cause the color to change to red? Note that in solution HCl exists as H+ and Cl- ions. b. Why does adding 6 M NaOH to the red solution tend to make it turn back to yellow? Note that in solution NaOH exists as Na+ and OH- ions. How does increasing OH- shift Reaction 3 in the discussion section? How would the resulting change in H+ affect the dissociation reaction of HMO?
Vitamin C is ascorbic acid (HC6H7O6), for which Ka is 8.0105. Calculate the pH of a solution made by dissolvinga 500-mg tablet of pure vitamin C in water anddiluting to 100 mL.
Calculate the pH of solutions that are 0.25 M formic acid and 0.40 M sodium formate. 0.50 M benzoic acid and 0.15 M sodium benzoate.
Consider a solution prepared by mixing a weak acid HA and HCl. What are the major species? Explain what is occurring in solution. How would you calculate the pH? What if you added NaA to this solution? Then added NaOH?