Calculate the value of Ka from the molarity and from the value of [H +] obtained above. To calculate kVA, you need to enter the known values of voltage and the current into the respective fields. Dissociation constant (Kd ) is the rate constant of dissociation at equilibrium, defined as the ratio koff / kon (where koff and kon are the rate constants of association of the drug off and on to the receptor). I have this question, and I'm not quite sure how to use the information they've given. You can calculate the kb value of an acid in a similar way that you calculate the pOH of an acid You must know that the Kw = 10^-14, and that Ka X Kb=Kw Now you must sustitute, 1.8*10^-10 *Kb = 1*10^-14 Solve for Kb Kb = 1.0 * 10^-14/1.8 * 10^-10 Kb = 5.55*10^-5 2) pH of 0.08M HCOOH solution, Ka = 1.8*10^-10 HCOOH … Trichloroacetic acid (CCl3CO2H) is a corrosive acid that is used to precipitate proteins. How to find the KA rating of Circuit breakers? Calculate the acid dissociation constant K a for a 0.2 M aqueous solution of propionic acid (CH 3 CH 2 CO 2 H) that is found to have a pH value of 4.88. Single & Three Phase Line kVA calculator is an online tool used in electrical engineering to measure the unknown quantity by two known quantities applied to the below formulas for single phase and three phase connection. 6. In addition, do not use the KA since it wil confuse your results. Return to a listing of many types of acid base problems and their solutions. A large Ka value also means the formation of products in the reaction is favored. For 0.1 M HCOOH: [H+] = 0.004154. pH = -log([H+]) = -log(0.004154) = 2.38. 7. a. Pipet another 10.00 ml of unknown acid into a clean 125 ml Erlenmeyer flask. Any help would be great! Return to the Acid Base menu. Then you need to calculate value of heat pulse and 1s current (expected value of current during one second). Ka = [H +]*[HCOO-]/[HCOOH] where, Ka = x 2 /(c - x), where. Now you know how to calculate pH using pH equations. Calculate Ka for trichloroacetic acid. Before breaker's selecting for your electrical system, you need to calculate value of expected short circuit current at the place of breaker's installation. The Ka of HC2H3O2 is found by calculating the concentrations of the reactants and products when the solution ionizes and then dividing the concentrations of the products multiplied together over the concentration of the reactant. Equations for converting between Ka and Kb, and converting between pKa and pKb. c is the molar concentration of the solution; and; x is equal to molar concentration of H +. Calculate the K a of an acid (or K b of a base) , given the concentration and the percent dissociation. Problem #1: A 0.150 M solution of acetic acid (shorthand formula = HAc) is … Relationship between Ka of a weak acid and Kb for its conjugate base. The Ka value for most weak acids ranges from 10-2 to 10-14. When you have a curve and you fit this curve with a 1:1 langmuir model, you will get the k a and k d as fitted parameters and you can calculate the K D as described above. 5. Calculate the molarity of your unknown acid solution, which will be a monoprotic acid. The pH of a 0.050 M solution of trichloroacetic acid is the same as the pH of a 0.040 M HClO4 solution. A large Ka value indicates a strong acid because it means the acid is largely dissociated into its ions. A small Ka value means little of the acid dissociates, so you have a weak acid. Affinity in chemistry is the tendency of dissimilar chemical species to form chemical compounds. For the best answers, search on this site To solve the problem, first, write the chemical equation for the reaction.