Test 3 - Title: Exam3 Started: Submitted: Timespent:...

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Title: Exam 3 Started: April 28, 2010 11:15 AM Submitted: April 28, 2010 12:20 PM Time spent: 01:04:44  Total score: 20/20 = 100%   Total score adjusted by 0.0  Maximum  possible score: 20  1.   At 25  o C the solubility of copper(II) sulfide is 1.71 x 10 -16  mol/L. Calculate  K sp  at this temperature. Give your answer in scientific notation to 2 SIGN FIGURES (even though this is strictly incorrect).    Student Response Value Correct Answer 1.  2.9E-32  100% Equals  2.9e-32  (100%) Score: 1/1    2.   What is the solubility of silver chloride (K sp  = 1.1 x 10 -10 ) in a solution of 0. magnesium chloride?    Student Response A. 5.5 x 10 -10 B. 2.8 x 10 -9 C.  2.8 x 10 -10 D.  1.0 x 10 -5 E. 3.0 x 10 -4 Score: 1/1    3.   A solution is 0.30 M AgNO 3  and 0.10 M Pb(NO 3 ) 2 . If solid Na solution, what is [Pb 2+ ] when Ag 2 SO 4  begins to precipitate?(K Ag 2 SO 4  = 1.1 x 10 -5
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  Student Response A. 1.6 x 10 -7 B. 1.2 x 10 -4 C.  3.3 x 10 -3 D.  1.3 x 10 -4 E. 1.3 x 10 -7 Score: 1/1    4.   Which of the following compounds will not have a different solubility with  in pH?    Student Response 1.  AgNO 3 2. Ca 3 (AsO 4 ) 2 3. SrCO 3 4. CuF 5. CuS Score: 1/1    5.   Which of the following processes has a negative value of delta S?    Student Response A. AgF(s)   Ag + (aq) + F - (aq)  B. Ba(NO 3 ) 2 (s) + Na 2 S(s)   BaS(s) + 2 NaNO 3 (s) 
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  Student Response C.  C 6 H 6 (l) + 15/2 O 2 (g)   6 CO
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Test 3 - Title: Exam3 Started: Submitted: Timespent:...

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