1 / 9

Mastering Acid-Base Chemistry: Definitions, Equilibrium, and Calculations

Learn about Arrhenius, Bronsted-Lowry, and Lewis definitions. Explore conjugate acid/base pairs, Ka and Kb relationship, and calculations.

xanthus-mcmillan
Download Presentation

Mastering Acid-Base Chemistry: Definitions, Equilibrium, and Calculations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Acid/ Base Definitions

  2. Arrhenius Definitions • Acid – H+/H3O+ producer • Base – OH- producer • Good for strong acids and bases

  3. Bronsted-Lowry Definition • Acid – proton (H+) donor • Base – proton acceptor • Accounts for some weak bases which do not have an OH-

  4. Lewis Definition • Acid – electron pair acceptor • Base – electron pair donor • Encompasses even more than the Bronsted-Lowry definition

  5. Identify the Lewis acid and base Ni2+ + 6NH3 Ni(NH3)62+ H+ + H2O  H3O+

  6. Conjugate Acid/Base • In every acid/base reaction, there are actually two acids and two bases • NH3 + HF → F- + NH4+ • On the reactant side, HF is an acid so it has a Ka, but on the product side F- the is a base so it has a Kb

  7. Relationship Between Ka and Kb • Ka x Kb = Kw • pK = - log K • pKa + pKb = 14.00

  8. Example • Calculate the Kb for the F- ion if the Ka for its conjugate acid is given in Appendix A5.1. • Calculate the Ka for the ammonium ion, NH4+.

  9. Example • Calculate the pH of a .30M NaF solution. The Ka for HF is 7.2x10-4.

More Related