Let's do the math and solve for Ka. Favourite answer. Compare Your Calculated Value To The Literature Value And Give Possible Explanations For The Deviation (if Any) Report Your Answers To Two Significant Figures. 3 Answers. A solution of ammonium cyanate (NH4OCN) is 1. acidic, because the cation and the anion hydrolyze to the same extent. What is the difficulty of this problem? 1) 9.00×10^-2 hypochlorous acid. Use a table of Ka or Kb values to determine whether Kc for the following reaction is less than, equal to or greater than 1 CH3CO2- + HSO4- <=> CH3CO2H + SO42-. Question: Using Your PH Values And The Concentration Of The Solution, Calculate The Ka Or Kb For Each Cation Or Anion That Hydrolyzes. Answer Save. Key Terms. 1 times 10 to the negative 14. Ka=2.510^-8. Ka=1.3x10^-10 . 16 0. • pKa and pKb are the logarithmic scales of Ka and Kb. Ka and Kb are used to calculate the pH of solutions containing weak acids and bases. This question is off-topic. 2. chemistry. ChemTeam. Ka is equal to 2.7 times 10 to the negative 11. After many calculations you were able to determine strong and weak acids. The solution technique for this type of problem works for almost all weak acids. Ka and Kb are the acid and base dissociation constants which serve as quanitified measurements of the strength of an acid in solution, respectively. References. NH4+ + HCO3- <=> H2CO3 + NH3. Whether you use Ka or Kb depends on what the problem is asking you to do. It does not determine absolute acid strength, though, only relative (to the solvent), so keep that in mind. We need to divide that by 3.7 times 10 to the negative 4. I mean the solid is 100% solid but there is no solvent so you are sort of dividing by 0 to try to get concentration. Therefore, you will be solving for Ka. My estimated pH values for NaCl and ZnCl2 are 6.7 and 4.3 respectively. To do this problem, you set up the reaction equation: HCOOH --> H+ + COOH-. I think I'm supposed to set up an ICE table for problems likes these, but I'm not sure. The acid ionization constant, Ka Communicates the strength of any weak acid by using the equilibrium constant expression for a Bronsted-Lowry reaction equation showing the acid ionizing in water. Just beware - Ka and Kb must be those of the conjugated pair of acid and base, and in the latter case if the H + is 10-4 M it is concentration of OH-that is 10-10, not necessarily a concentration of a "base" (whatever it is intended to be). Our tutors rated the difficulty ofWhat is the Kb for C2H3O2- if the Ka for HC2H3O2 is 1.8 x 10...as low difficulty. All right, so let's go back up here. Active 3 years, 9 months ago. Sep 20, 2015 #7 Nishantkumar19. Using K a or pK a to Calculate [H+] and/or pH; using pH to calculate K a or pK a p5 Conceptual Questions. Okay thanks . The p in pH stands for "negative log of". Use a table of ka or kb values to determine whether k. School University of Houston; Course Title CHEM 1332; Type. 2)8.4×10^-3 phenol. Ka = (10-2.4) 2 /(0.9 - 10-2.4) = 1.8 x 10-5. Answer Save. If you think about what that does for your KA, that's gonna give you an extremely high value for your KA. Libre Texts: Calculating a Ka Value from a Known pH ; Libre Texts: How to Predict the Outcome of an Acid-Base Reaction; University of Washington: Weak Acids - Tritration of Acetic Acid; About the Author. Then you set up the equation: Ka= {(molarity of H)(molarity of COOH)} / (molarity of HCOOH). Ksp= [Products] Steps in solving problems 1. Steve O. Lv 7. In the Brønsted–Lowry definition of acids and bases, an acid _____ a. is a proton donor. Other Sciences. pKa and pKb are the logarithmic acid and base dissociation constants, respectively. Calculate the pH by taking the -log of the concentration of the H3O. Equilibrium constant when given Ka and Kb of reactants [closed] Ask Question Asked 3 years, 10 months ago. At the orgo level you may be given ka/pKa values, but not for the purpose of doing … Ksp comes from Keq, only this time our reactants are solid so they get left out. In general chemistry you spent many hours drawing out ICE charts and doing pKa calculations. This equation can be used to determine any of the variables if the other two variables are known. Uploaded By stai4. Ka, Kb and Kw are related in a simple equation: Ka multiplied by Kb equals Kw. Table 5 Exper. Expert Answer . CH3CO2^- + HSO4^- <=> CH3CO2H + SO4^2- a) Kc < 1 b) Kc = 1 c) Kc > 1 code used on German vehicle registration plates) Karnataka, India; Science and technology. Now we have Ka times 3.7 times 10 to the negative 4 is equal to Kw which is 1.0 times 10 to the negative 14. I've been reading in the text book but still don't get it. This preview shows page 1 - 3 out of 3 pages. Use a table of Ka of Kb values to determine whether K c for the following reaction is less than, equal to or greater than 1. Calculate the pKa or pKb (pKa/b =-log Ka/b) and record these in your data table. Value Of Ka Or Kb N/A Lit. Using tabulated Ka and Kb values, calculate the pH of each of the following solution? An acid ionization constant that's much, much greater than one. 3)9.5×10^-2 hydroxylamine. Favorite Answer. Using Kb Values to Guide Cleaning of Fluxes, Oils and Grease. You can view video lessons to learn Ka and Kb. 0 $\begingroup$ Closed. Calculate the Ph of 0.30 M NaF. If in the equation the reactants have an acid mixing with water then you use Ka. Chemistry. The Solubility Product: Ksp. Using Ka and pKa To Predict Equilibrium and Strength of Acids . d. breaks stable hydrogen bonds. Hence, the use of a generic acid. Record these in your data table. K a may be used to measure the position of equilibrium: If K a is large, the formation of the products of the dissociation is favored. Our tutors have indicated that to solve this problem you will need to apply the Ka and Kb concept. 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