CHE 1302 Study Guide - Midterm Guide: Buffer Solution, Conjugate Acid, Weak Base
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16. 2 buffers: they are solutions that resist ph change when small amounts of a strong acid or base. Ch3cooh + h2o (cid:1429) h3o+ + ch3coo: and we add some more ch3coona(aq) so [ch3coo-] (cid:1371) [h3o+] (cid:1373) (so the ph of the solution (cid:1371)) and [ch3cooh] (cid:1371) 16. 5 solubility equilibria & the solubility product constant. Many ionic compounds have very low solubility (less than . 01m) in h2o. They are referred to as (cid:862)i(cid:374)solu(cid:271)le(cid:863) a(cid:374)d for(cid:373) pre(cid:272)ipitates. Equilibrium exists between undissolved solid and its ions in a saturated solution: Baso4(s) (cid:1430) ba2+(aq) + so4 (cid:1372) so [ba2+] and [so4. But now solubility is much less (k << 1) 2-(aq: the amount of compound that dissolves per unit volume of saturated solution, kc is used for dissolving a slightly soluble solid. Is equal to the # of moles of the compound that will dissolve in 1l.
