In an aqueous solution of a weak acid, HA, the assumption is often made that [HA]equilibrium = [HA]initial- This approximation is reasonable if the initial concentration of the acid is sufficiently large compared to K. What multiple of K, must the initial concentration of a weak acid exceed, for the initial concentration and the equilibrium concentration to be within 9.98 percent of each other?

In an aqueous solution of a weak acid, HA, the assumption is often made that [HA]equilibrium = [HA]initial- This approximation is reasonable if the initial concentration of the acid is sufficiently large compared to K. What multiple of K, must the initial concentration of a weak acid exceed, for the initial concentration and the equilibrium concentration to be within 9.98 percent of each other?

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter16: Solubility And Precipitation Equilibria

Section: Chapter Questions

Problem 70AP

See similar textbooks

Similar questions

For the following reactions, predict whether the pressure of the reactants or products increases or remains the same when the volume of the reaction vessel is increased. (a) H2O(l)H2O(g) (b) N2(g)+3H2(g)2NH3(g) (c) C2H4(g)+H2O(g)C2H5OH(g)
Draw a nanoscale (particulate) level diagram for an equilibrium mixture of
Because carbonic acid undergoes a second ionization, the student in Exercise 12.39 is concerned that the hydrogen ion concentration she calculated is not correct. She looks up the equilibrium constant for the reaction HCO,-(aq) «=* H+(aq) + COf'(aq) Upon finding that the equilibrium constant for this reaction is 4.8 X 10“H, she decides that her answer in Exercise 12.39 is correct. Explain her reasoning. A student is simulating the carbonic acid—hydrogen carbonate equilibrium in a lake: H,CO,(aq) 5=6 H+(aq) + HCO,'(aq) K = 4.4 X 10'7She starts with 0.1000 A1 carbonic acid. W hat are the concentrations of all species at equilibrium?
The amino acid alanine has two isomers, -alanine and -alanine. When equal masses of these two compounds are dissolved in equal amounts of a solvent, the solution of -alanine freezes at the lowest temperature. Which form, -alanine or -alanine, has the larger equilibrium constant for ionization (HXH++X)?