Chapter 11. Acids, Bases, & Salts Acid/Base Equilibrium. Properties of Acids. sour or tart taste strong acids burn; weak acids feel similar to H 2 O acid solutions are electrolytes acids react with most metals to release H 2 acids cause indicators to change color Acids turn litmus red.
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Acids, Bases, & Salts
HC2H3O2 + H2O → C2H3O2- + H3O+
NH3 + H2O → NH4+ + OH-
These are the ions that result when polyprotic acids release H+ ions one at a time. Notice that they can accept an H+ or they can release an H+.
What is the [OH-] of a solution that is pH8.56?
What is the pH of a 0.20M HC2H3O2, with Ka = 1.8 x 10-5?
(also find % ionization)
H3PO4 → H+ + H2PO4- Ka = 7.5 x 10-3
H2PO4- → H+ + HPO42- Ka = 6.2 x 10-8
HPO42- → H+ + PO43- Ka = 4.8 x 10-13
H2O(l) ↔ H+(aq) + OH-(aq)
Kw = [H+][OH-] = 1.0 x 10-14
Kw = KaKb pKa + pKb = 14
Strong Acids Strong Bases
pH = -log(.20) =