1e03-tut8-a

1e03-tut8-a - CHEM 1E03 TUTORIAL # 8 SOLUTIONS _ Assume all...

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CHEM 1E03 TUTORIAL # 8 SOLUTIONS ______________________________________________________________________________ Page 1 of 4 Assume all calculations are at 25ºC, so that K w = 1.0 × 10 -14 (and pK w = 14.00). 1. Write the Lewis structure of the conjugate acid of each of the following species: CH 3 COO (acetate ion) ClO 2 (chlorite ion) CH 3 COOH (acetic acid) HOClO (chlorous acid) CH 3 -C(=O)-O-H H-O-Cl=O (lone pairs on O and Cl not shown, both are oxoacids in which the acidic hydrogen is bonded to oxygen) 2. Write the Lewis structure of the conjugate base of each of the following species: H 2 PO 4 (dihydrogenphosphate ion) (CH 3 ) 2 NH 2 + (dimethylammonium ion) HPO 4 2 (hydrogenphosphate ion) (CH 3 ) 2 NH (dimethylamine) H-O-P(=O)O 2 2 CH 3 -NH-CH 3 (lone pairs on O and N not shown) 3. a) Write a chemical equilibrium and the K b expression for the ionization reaction of the weak base methylamine (CH 3 NH 2 ) in water. CH 3 NH 2 + H 2 O CH 3 NH 3 + + OH K b = [CH 3 NH 3 + ] [OH ] [CH 3 NH 2 ] b) Write a chemical equilibrium and the K a expression for the ionization reaction of the
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This document was uploaded on 03/29/2012.

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1e03-tut8-a - CHEM 1E03 TUTORIAL # 8 SOLUTIONS _ Assume all...

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