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Unformatted text preview: HAc or HC 2 H 3 O 2 is really CH 3 COOH (c) Organic bases have an amine ( –NH 2 ) group. CH 3 NH 2 is a variation of NH 3 (c) Amino acids are bifunctional . NH 2-CH 2-COOH 5. Calculate [H 3 O + ] for 0.010 M H 2 SO 4 – an exceptional case (Ka2 is not so small). (a) The first proton in H 2 SO 4 is strongly acidic, so the first reaction goes essentially to completion: H 2 SO 4 + H 2 O H 3 O + + HSO 4-, [H 3 O + ] (from this) = _____ (b) The second proton does contribute significantly to [H 3 O + ]. We must solve for how much H 3 O + is present after the second ionization (Ka2) reaches equilibrium. The [H 3 O + ] produced from the first ionization is present “initially” for this reaction. HSO 4-(aq) + H 2 O ( l ) H 3 O + (aq) + SO 4-2 (aq) , Ka2 = 0.010 I C E [HSO 4-] = _____________ [SO 4-2 ] = _______________ [H 3 O + ] = ______________ pH = _______________ b = _____________...
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This note was uploaded on 09/19/2011 for the course CHM 2051 taught by Professor Staff during the Spring '08 term at University of Florida.
- Spring '08