Chem 2 Test 3 - ViewAttempt1of1 Title: Started: Submitted:...

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View Attempt 1 of 1  Title: Exam 3 Started: April 29, 2009 5:44 PM Submitted: April 29, 2009 7:04 PM Time spent: 01:19:58  Total score: 16/20 = 80%   Total score adjusted by 0.0  Maximum possible score: 20  1. Chapter 11 S Ksp 38   At 25  o C the solubility of magnesium phosphate is 8.64 x 10 -6  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.  5.2E-24  100% Equals  5.2e-24  (100%)    General  Feedback: K sp  = 108S 5 Score: 1/1    2. CIE 4   What is the solubility of silver chloride (K sp  = 1.1 x 10 -10 ) in a solution of 0.20 M  magnesium chloride?     Student  Response Value Correct  Answer Feedback a.  2.8 x 10 -10 100%      b.  3.0 x 10 -4 0%      c.  5.5 x 10 -10 0%      d.  2.8 x 10 -9 0%      e.  1.0 x 10 -5 0%         Score: 0/1    3. Chapter 11 Precipitate 22
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  The K sp  of CaF 2  at 25  o C is 4 x 10 -11 . Consider a solution that is 1.0 x 10 -3  M Ca(NO 3 ) and 1.0 x 10 -4  M NaF.     Student  Response Value Correct  Answer Feedback 1.  Q > K sp  and  precipitate  will form. 0%      2.  Q > K sp  and  precipitate  will not  form. 0%      3.  Q < K sp  and  precipitate  will not  form. 100%      4.  Q < K sp  and  precipitate  will form. 0%      5.  The  solution is  saturated. 0%         Score: 1/1    4. Serial Precipitation 12
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  A solution is 0.30 M AgNO 3  and 0.10 M Sr(NO 3 ) 2 . If solid Na 2 SO 4  is added to the  solution, what is [Sr 2+ ] when Ag 2 SO 4  begins to precipitate?(K sp  SrSO 4  = 3.2 x 10 -7 Ag 2 SO 4  = 1.1 x 10 -5     Student  Response Value Correct  Answer Feedback a.  2.6 x 10 -3 100%      b.  3.3 x 10 -3 0%      c.  5.7 x 10 -4 0%      d.  1.2 x 10 -4 0%      e.  3.2 x 10 -6 0%         Score: 0/1    5. pH Solubility 1
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This note was uploaded on 03/06/2011 for the course CHEM 1332 taught by Professor Shiv during the Spring '08 term at University of Houston.

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Chem 2 Test 3 - ViewAttempt1of1 Title: Started: Submitted:...

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