15028369-Chem-1332-Practice-Final-2009

15028369-Chem-1332-Practice-Final-2009 - View Attempt

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View Attempt 1 of 2 Title: Practice Final Started: May 4, 2009 7:24 PM Submitted: May 4, 2009 7:24 PM Time spent: 00:00:27 Total score: 0/34 = 0% Total score adjusted by 0.0 Maximum possible score: 34 1. What is the solubility in moles/liter for zinc hydroxide at 25 o C given a K sp value of 2.0 x 10 -17 . Write using scientific notation and use 1 or 2 decimal places (even though this is strictly incorrect!) Student Response Value Correct Answer 1. not answered 0% Equals 1.71e-6 (100%) Equals 1.7e-6 (100%) General Feedback: K sp = 4S 3 Score: 0/1 2. When 7.5 x 10 -6 g of KOH is dissolved in 1.00 L of 1.0 x 10 -3 M Cu(NO 3 ) 2 , a precipitate of Cu(OH) 2 is formed. True or False? (K sp of Cu(OH) 2 is 2.2 x 10 -20 ) Student Response Value Correct Answer Feedback 1. True 100% 2. False 0% Score: 0/1 3. Which of the following compounds will not have a different solubility with a change in pH? Student Response Value Correct Answer Feedback 1. AgNO 3 100% 2. Ca 3 (AsO 4 ) 2 0% 3. SrCO 3 0% 4. CuF 0% 5. CuS 0% View Attempt https://scholar.uh.edu/webct/urw/lc261766704.tp261766721/ViewStudent. .. 1 of 13 5/4/2009 8:03 PM
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Score: 0/1 4. Answer this question without using numbers from the book (or anywhere else!) D S for the following reaction is negative. True or false? C 3 H 8 (g) => C 2 H 6 (g) + CH 4 (g) Student Response Value Correct Answer Feedback 1. True 0% 2. False 100% Score: 0/1 5. Given the values of D G f o given below in kJ/mol, calculate the value of D G o in kJ for the combustion of ammonia to forms nitrogen dioxide and water vapor. (Use the lowest possible integers when balancing the equation). D G f o (NO 2 ) = 55.8 D G f o (H 2 O(g)) = -225.7 D G f o (NH 3 ) = -17.5 Student Response Value Correct Answer Answer not answered 0% -1,061 Score: 0/1 6. The value of D G o for the reaction, N 2 (g) + 3 H 2 (g) <=> 2 NH 3 (g) is -32.90 kJ at 298 K. Calculate the value of D G in kJ at 298 K if the partial pressures of N 2 , H 2 and NH 3 are 4.500, 4.375, and 1.230 atm respectively. Student Response Value Correct Answer Answer not answered 0% -46.6 Score: 0/1 View Attempt https://scholar.uh.edu/webct/urw/lc261766704.tp261766721/ViewStudent. .. 2 of 13 5/4/2009 8:03 PM
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7. Balance the following equation in acidic solution: Zn(s) + NO 2 - (aq) => Zn 2+ (aq) + N 2 (g) What is the coefficient of water? Student Response Value Correct Answer Feedback 1. 1 0% 2. 2 0% 3. 4 100% 4. 6 0% 5. 8 0% Score: 0/1 8. Calculate the pH of a solution that results from mixing 31.7 mL of 0.148 M HCN(aq) with 22.2 mL of 0.189 M NaCN. The K a value for HCN is 4.9 x 10 -10 . Student Response Value Correct Answer Answer not answered 0% 9.26 Score: 0/1 9. Calculate the pH during the titration of 20.00 mL of 0.1000 M CH 3 CH 2 CH 2 COOH(aq) with 0.1000 M NaOH(aq) after 19.82 mL of the base have been added.
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This note was uploaded on 02/17/2010 for the course CHEM 1332 taught by Professor Shiv during the Fall '08 term at University of Houston.

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15028369-Chem-1332-Practice-Final-2009 - View Attempt

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