Key Quiz 11 09-106 S 11 - in a concentrated 3.0 M NaCl(aq)...

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Name ______________________________ _ Quiz 11 (10 points) 09-106 Spring 2011 Recitation ( CIRCLE ONE TA and ONE TIME ): Christian Steve Brendan 6:30 7:30 4/26/11 (10 minutes allowed) In order to ensure the maximum amount of partial credit on short problems, please show all work and clearly circle your final answers. A listing of constants and equations are on the reverse side. 1. If AgBr(s) (a slightly soluble salt) is added to a slightly soluble solution of AgI(s), the solubility of AgI(s) will ( circle one below ) increase decrease remain the same (2 points) 2. A concentrated NaOH(aq) solution is slowly added to a solution containing 1.0 M Y(NO 3 ) 3 (aq) and 1.0 M Zn(NO 3 ) 2 (aq). Which hydroxide solid precipitates first? Briefly explain. (4 points) [For Y(OH) 3 , K sp = 1.0 x 10 –22 . For Zn(OH) 2 , K sp = 4.5 x 10 –17 ] 3. Write the equilibrium formation reaction for the complex ion [Cu(NH 3 ) 4 ] 2+ (aq). ( K f = 1.1 x 10 12 ) (2 points) 4. The solubility of AgCl(s) is found to be higher
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Unformatted text preview: in a concentrated 3.0 M NaCl(aq) solution than in pure water. This is due to the ( circle one below ) (1 point) common ion effect “uncommon” ion effect increase in pH formation of a complex ion 5. If AgBr(s) (a slightly soluble salt) is added to a solution of KNO 3 (aq), the solubility of AgBr(s) ( circle one below ) increases decreases remains the same (1 point) Name ______________________________ _ Quiz 11 (10 points) 09-106 Spring 2011 Recitation ( CIRCLE ONE TA and ONE TIME ): Christian Steve Brendan 6:30 7:30 4/26/11 (10 minutes allowed) _____________________________________________________________________________________ pH = -log[H 3 O + ] pOH = -log[OH-] pH + pOH = 14 [H 3 O + ][OH-] = 1.0 x 10-14 (@25°C) K a K b = 1.0 x 10-14 pK a = -log K a pK b = -log K b pH = pK a + log{ [base] / [acid] } [base]/[acid] = 10 pH - pKa _____________________________________________________________________________________...
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This note was uploaded on 09/29/2011 for the course CHEMISTRY 09-106 taught by Professor Vuocolo during the Fall '09 term at Carnegie Mellon.

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Key Quiz 11 09-106 S 11 - in a concentrated 3.0 M NaCl(aq)...

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