With moles and take the log of the mole ratio.īearing in mind that 1.00 g of both the imidazole and the imidazole hydrochloride are included, Since the volumes effectively cancel in the concentration ratio within the log term, we can choose to work (b) In this part we can apply the Henderson-Hasselbalch equation. The shelf", but would be found as a salt with an anion, such as Cl −, as in Note that ImH + is not a compound we could procure "off Here we have used Im and ImH + as convenient, yet more specific abbreviations for the neutral base More specifically, the equations for imidazole hydrochloride and imidazole are shown below, along with theĬorresponding expressions for the equilibrium constants K a and K b. The base hydrolysis of the neutral base B would be written as A positively-charged acidic species can be (a) The acid dissociation equation is a representation of a general Brønsted-Lowry acidĪs reactant, with products the conjugate base and H +. (d) How many milliliters of 1.07 M HClO 3 should be added to 1.00 g of imidazole ML of 1.07 M HClO 3 are added to the solution. (c) Calculate the pH of the solution if 2.30 (b) Calculate the pH of a 1.00-mL solution containingġ.00 g of imidazole (FM 68.08) and 1.00 g of imidazole hydrochloride Imidazole hydrochloride and the corresponding expression for K a.ĭo the same for base hydrolysis reaction and K b for imidazole. (a) Write the chemical equation for the acid dissociation of Preparation of a buffer, calculations for a target pH and total volume. BIOCHEMISTRY TOPICS Problems in acid-base chemistry: BuffersĬhange in pH of buffer upon addition of strong acid.Ĭomposition of a buffer calculated from a target pH.
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