Exam20001 - 2 1(18 points Indicate whether the following...

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Unformatted text preview: . . 2 1- (18 points) Indicate whether the following statements are TRUE (T) or FALSE (F) by circling the correct response. I - d" ’\ \‘K’T‘ .~-’"‘- " .._ a The activity coefficients of ionic. Species increase with increasing ionic strength -' T._:, F - a..- 1...! b For a specific weak base, B, the value of the equilibrium constant, K1,, generally exhibits a modest dependence on temperature. . " T .' ' F i. c-. When designing a buffer solution (of a" weak base and a salt of the conjugate acid of that weak base) “In-1‘ . the weak base should be chosen so that the desired pH ~ pr for the weak base TNT. .‘T; . 3.1 " of d. Molecules or ions that can function either as an acid or _a base depending upon conditions are said to __ _---""'N F be photoamperic. %%Qg“\ ' T E; ‘ _.-..‘ 1 e. Successive ionization constants for polyprotie acids usually decrease by at lea-st several orders of 1. ‘1’ . 'w-M.‘ magnitude. . ‘ a; T 11.: a...» .1...“ - . f. The addition of an inert salt to a- solution containing a sparingly soluble salt. generally decreases the _.a. 'SOlflbility of the sparingly soluble salt. ‘ __ - T F1“ U- "—"—1 ___ .rr :3 _2 (18 points) Fill in the blank with the MOST APPROPRIATE response (this may require _a single. word or a short phrase, DO NOT use symbols or abbreviations). For full credit, answers must be CONEPLETE and - ACCURATE. ‘ _FWH . ---u—|-—---——r—-1-—-—r-—-—-— "" —'-'"'—"'-'—"_"'-_'-" " I L57 and if buffer syste i 1. P :' _, ' b. Bilffers often play importantro' est" {time-11:" 319111 f 1"» in analytical, biochemical, 311d PhY-siological processes andiu ‘ . . ' ‘iJTl/ons insolution. _ c. The three types of strong electrolytes include: 1,; 1,3,1; ’21.: - (1) $311 ‘1 3 . ,(2) ii“ .1 1 3(3) d The Henderson— Hasselbach equation can be used to determine the pH of a solution" containg a Weak 1H3“ F1 “1 i‘., . ‘ -’ base and ‘1th £6511 111 ("iii 1?: GT 13:11:11,111 -sc “x__ _ _ . 1 . . _ _..... _ .. . .. ,H '1. ...
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