chem2 test3

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View Attempt 1 of 1 Title: Exam 3 Started: April 28, 2009 5:22 PM Submitted: April 28, 2009 6:42 PM Time spent: 01:19:52 Total score: 17/20 = 85% Total score adjusted by 0.0 Maximum possible score: 20 1. Chapter 11 S Ksp 12 At 25 o C the solubility of zinc sulfide is 1.26 x 10 -12 mol/L. Calculate the value of K sp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect). Student Response Value Correct Answer 1. 1.6E-24 100% Equals 1.6e-24 (100%) General Feedback: K sp = S 2 Score: 1/1 2. CIE 1 What is the solubility of silver iodide (K sp = 8.3 x 10 -17 ) in a solution of 0.20 M magnesium iodide? Student Response Value Correct Answer Feedback a. 2.1 x 10 - 16 100% b. 2.7 x 10 - 6 0% c. 4.2 x 10 - 16 0% d. 2.1 x 10 - 15 0% e. 9.1 x 10 - 9 0% Score: 0/1 3. Chapter 11 Precipitate 1 The K sp of AgCl at 25 o C is 1.6 x 10 -10 . Consider a solution that is 1.0 x 10 -5 M NaCl and Page 1 of 10 View Attempt 4/30/2009 https://scholar.uh.edu/webct/urw/lc261766704.tp261766721/ViewStudentAttempt.dowebct. ..

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1.0 x 10 -5 M AgNO 3 . Student Response Value Correct Answer Feedback 1. Q > K sp and a precipitate will form. 0% 2. Q > K sp and a precipitate will not form. 0% 3. Q < K sp and a precipitate will not form. 100% 4. Q < K sp and a precipitate will form. 0% 5. The solution is saturated. 0% Score: 1/1 4. Serial Precipitation 8 A solution is 0.30 M AgNO 3 and 0.10 M Pb(NO 3 ) 2 . If solid Na 2 SO 4 is added to the solution, what is [Pb 2+ ] when Ag 2 SO 4 begins to precipitate?(K sp PbSO 4 = 1.6 x 10 -8 ; Ag 2 SO 4 = 1.1 x 10 -5 ) Student Response Value Correct Answer Feedback a. 1.3 x 10 - 4 100% b. 3.3 x 10 - 3 0% c. 1.3 x 10 - 7 0% d. 1.2 x 10 - 4 0% Page 2 of 10 View Attempt 4/30/2009 https://scholar.uh.edu/webct/urw/lc261766704.tp261766721/ViewStudentAttempt.dowebct. ..
e. 1.6 x 10

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chem2 test3 - View Attempt Page 1 of 10 View Attempt 1 of 1...

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