Buffer - 4 Cl 1 Solutions made of weak acids plus a soluble...

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The Common Ion Effect and Buffer Solutions -if a solution is made in which the same ion is produced by two different compounds the common ion effect is exhibited -buffer solutions… -there are two common kinds of buffer solutions 1. Solutions made from a weak acid plus a soluble ionic salt of the weak acid 2. Solutions made from a weak base plus a soluble ionic salt of the weak base acidic buffers: CH 3 COOH and NaCH 3 COO; HCO 3 H and NaCOOH; HF and NaF basic buffers: Na 2 CO 3 and NaHCO 3 ; NH 3 and NH
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Unformatted text preview: 4 Cl; 1. Solutions made of weak acids plus a soluble ionic salt of the weak acid-example: weak acid – acetic acid CH 3 COOH soluble ionic salt – sodium acetate NaCH 3 COO Example 19-1 CH 3 COOH ↔ CH 3 COO-+ H + I 0.15 0.15 C-x +x +x E 0.15-x 0.15+x x K a = 1.8 x 10-5 X = 1.8 X 10-5 [h + ] = 1.8 X 10-5 pH = 4.74 HA ↔ H + +A = K a = [H + ][A-]/[HA] Example 19-2 K a = 1.8 x 10-5 NH 3 + H 2 O ↔ NH 4 + + OH-[OH-] = 9.6 x 10-6 pOH = 5.05 pH = 8.95...
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This note was uploaded on 10/04/2011 for the course CHEM 1212 taught by Professor Suggs during the Spring '08 term at UGA.

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