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100% [HA] Convert Ka and Kb: Kw = Ka ∙ Kb = 1.010–14 Acid‐Base Properties of Salts – salt = ionic compound – Soluble salts dissociate into ions in water. – Classify a given salt as acidic, basic, neutral. page 1 of 3 Chapter 17: Acids and Bases (Continued) Acid‐Base Properties of Salts (Continued) Ions that produce acidic solutions – NH4+ and highly charged metal ions: Al3+, Zn2+, etc., except cations of strong bases Ions that produce basic solutions – anions that are conj. bases of weak acids. – all anions except anions of strong acids – Note: SO42– + H2O HSO4– + OH– Ions that produce neutral solutions – do not react with H2O to make H+ or OH– Salts with an acidic cation and basic anion – Classify a given salt as acidic, basic, neutral. – If Ka>Kb, salt is acidic. – If Kb>Ka, salt is basic. – Account for different ion concentrations by multiplying initial concentration with Ka or Kb. pH Calculations for Weak Bases – Write equation for reaction of base with H2O. – Write equilibrium expression for the weak base. – The...
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This document was uploaded on 03/22/2014 for the course CHEM 162 at Seattle Central Community College.
- Fall '11