1e03-tut8-q

1e03-tut8-q - CHEM 1E03 TUTORIAL 8 Assume that all aqueous solutions are at 25C so that Kw = 1.00 10-14 1 Write the Lewis structure of the

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CHEM 1E03 TUTORIAL # 8 ______________________________________________________________________________ Page 1 of 1 Assume that all aqueous solutions are at 25ºC so that K w = 1.00 × 10 -14 1. Write the Lewis structure of the conjugate acid of each of the following species: CH 3 COO (acetate ion) ClO 2 (chlorite ion) 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) 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. b) Write a chemical equilibrium and the K a expression for the ionization reaction of the conjugate acid of methylamine (CH 3 NH 2 ) in water. c) Establish that, for a conjugate acid/base pair in aqueous solution at 25ºC, pK a + pK b = 14 4. (a)
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This document was uploaded on 03/29/2012.

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