Test_3_(Spr09)_v2[1]

# Test_3_(Spr09)_v2[1] - Total score 16/20 = 80 Total score...

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Total score: 16/20 = 80% Total score adjusted by 0.0 Maximum possible score: 20 1. Chapter 11 Ksp S 1 What is the solubility in moles/liter for barium carbonate at 25 o C given a K sp value of 8.1 x 10 -9 . Write using scientific notation and use 1 or 2 decimal places (even though this is strictly incorrect!) Student Response Value Correct Answer 1. 9.0E-5 100% Equals 9.0e-5 (100%) Equals 9.00e-5 (100%) Equals 9e-5 (100%) General Feedback: K sp = S 2 Score: 1/1 2. CIE 7 What is the solubility of silver chromate (K sp = 1.8 x 10 -12 ) in a solution of 0.20 M silver nitrate? Student Response Value Correct Answer Feedback a. 1.1 x 10 - 11 0% b. 7.7 x 10 -5 0% c. 9.0 x 10 - 12 0% d. 4.5 x 10 - 11 100% e. 1.3 x 10 -6 0% Score: 0/1

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3. Precipitate 6 When 7.5 x 10 -4 g of KOH is dissolved in 1.00 L of 1.0 x 10 -8 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: 1/1 4. Serial Precipitation 10 A solution is 0.10 M AgNO 3 and 0.20 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. 2.9 x 10 -4 100% b. 3.3 x 10 -3 0% c. 5.7 x 10 -4 0% d. 1.3 x 10 -3 0% e. 1.6 x 10 -6 0% Score: 1/1 5. pH Solubility 2 Which of the following compounds will have a different solubility with a change in pH?
Student Response Value Correct Answer Feedback 1. AgNO 3 0% 2. CaCl 2 0% 3. Ca(OH) 2 100% 4. CuCl 0% 5. Hg 2 Cl 2 0% Score: 1/1 6. Sign of Delta S 11

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Test_3_(Spr09)_v2[1] - Total score 16/20 = 80 Total score...

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