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Unformatted text preview: resulting solution will be basic, acidic or neutral. a) NaNO 2 Salt of a weak acid and strong base, pH>7, basic b) MgCl 2 Salt of strong base and strong acid, pH = 7, neutral c) NH 4 Cl Salt of strong acid and weak base, pH<7, acidic d) NH 4 CH 3 CO 2 H Salt of weak acid and weak base, K a = K b , pH=7, neutral 5. Indicate whether solutions of the following compounds will be acidic, basic, or neutral. Briefly explain why in each case) (10 points) a) NaOCl Salt of a weak acid and strong base. pH>7, basic b) CsCl Salt of a strong acid and strong base. pH=7, neutral c) NH 4 F (K b for NH 3 is 1.8 x 10-5 , K a for HF is 6.6 x 10-4 ) Salt of a weak acid and weak base. since K a for acid is greater than K b , for base, the K b for the conjugate acid will be greater than the K b of the conjugate base, so the solution will be acidic, pH<7....
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This note was uploaded on 12/03/2008 for the course CHEM 142 taught by Professor Zoller,williamh during the Spring '07 term at University of Washington.
- Spring '07