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SUPPL INSTR FOR CH 302 (GE 206E) - AnswersNatureofAcidsandBases

SUPPL INSTR FOR CH 302 (GE 206E) - AnswersNatureofAcidsandBases

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Practice Problems: The Nature of Acids and Bases 1. Write the formulas for the conjugate acids of (a) CH 3 NH 2 , methylamine (b) NH 2 NH 2 , hydrazine, (c) HCO 3 - and the formulas for the conjugate bases of (d) HCO 3 - , (e) C 6 H 5 OH, phenol, (f) CH 3 COOH 2. Write the proton transfer equilibria for the following acids in aqueous solution and identify the conjugate acid-base pairs in each one: (a) H 2 SO 4 , (b) C 6 H 5 NH 3 + , (c) H 2 PO 4 - , (d) HCOOH, (e) NH 2 NH 3 + . 3. Identify the Brønsted acid and base and the conjugate base and acid formed in the following reaction: HNO 3 (aq) + HPO 4 2- (aq) ↔ NO 3 - (aq) + H 2 PO 4 - (aq) 4. Write the two proton transfer equilibria that demonstrate the amphiprotic character of (a) HCO 3 - , (b) HPO 4 2- . Identify the conjugate acid-base pairs in each equilibrium. 5. State whether the following oxides are acidic, basic, or amphoteric: (a) BaO, (b) SO 3 , (c) As 2 O 3 , (d) Bi 2 O 3 . 6. One step in the manufacture of sulfuric acid is the highly exothermic reaction of SO 3 gas with sulfuric acid to form oleum, H 2 S 2 O 7 .
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