Calculate the pH of a 1.01×10-2M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86.
Calculate the pH of a 1.01×10-2M solution of the decongestant ephedrine hydrochloride if the pKb of...
Calculate the pH of a 1.41×10-2 M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86.
See Hint See Periodic Table Calculate the pH of a 142x102 Msolution af the decongestant ephedrine hydrochloride if the pKs of ephedrine (its conjugate base) is 3.86.
Ephedrine is a weak base. A 0.035 M solution of ephedrine has a pH of 11.33. What is the base ionization constant (Kb) for ephedrine? () 7.8 x 10-10 () 1.5 x 10-9 () 9.8 x 10-5 () 1.4 x 10-4
1.The pH of a 2.65×10-3 M solution of a weak base is 9.17. Calculate pKb for this base to two decimal places. 2.Determine the mass (in g) of sodium butanoate (NaC3H7COO) that must be added to 78.9 mL of 0.609 M butanoic acid to yield a pH of 6.43. Report your answer to 3 significant figures. Assume the volume of the solution does not change and that the 5% approximation is valid.
a. Calculate the pH of a 0.205 M aqueous solution of aniline (C6H5NH2, Kb = 7.4×10-10) and the equilibrium concentrations of the weak base and its conjugate acid. pH = [C6H5NH2]equilibrium = M [C6H5NH3+]equilibrium = M b. Calculate the pH of a 0.0555 M aqueous solution of piperidine (C5H11N, Kb = 1.3×10-3) and the equilibrium concentrations of the weak base and its conjugate acid. pH = [C5H11N]equilibrium = M [C5H11NH+ ]equilibrium = M
A buffered solution containing dissolved aniline, C6H5NH2, and aniline hydrochloride, C6H5NH3Cl, has a pH of 5.65. a) Determine the concentration of C6H5NH3 in the solution if the concentration of C6H5NH2 is 0.230 M. The pKb of aniline is 9.13. [C6H5NH3+] = ______M b)Calculate the change in pH of the solution, ?pH, if 0.386 g NaOH is added to the buffer for a final volume of 1.45 L. Assume that any contribution of NaOH to the volume is negligible. pH =...
Calculate the pH of an aqueous solution containing 100 mM of phenol (Kg 1.6 x 10 10 and 75 mM of its conjugate base. Show your work Calculate the pH of an aqueous solution containing 100 mM of phenol (Kg 1.6 x 10 10 and 75 mM of its conjugate base. Show your work
A) Calculate the pH of a 0.0116 M aqueous solution of methylamine (CH3NH2, Kb = 4.2×10-4) and the equilibrium concentrations of the weak base and its conjugate acid. pH = ? [CH3NH2]equilibrium = ? M [CH3NH3+ ]equilibrium = ? M B)Calculate the pH of a 0.0115 M aqueous solution of nitrous acid (HNO2, Ka= 4.6×10-4) and the equilibrium concentrations of the weak acid and its conjugate base. pH = ? [HNO2]equilibrium = ? M [NO2- ]equilibrium = ? M C)...
A solution of ephedrine has a pH of 11.8. What is its initial concentration and the percent ionization? Kb=1.4x10^-4. Ephedrine = C10H15ON
calculate the pH of a 0.057 M solution of pieridine (pKb = 2.88)