Exam 3-2 - View Attempt 1 of 1 Title: Exam 3 Started:...

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View Attempt 1 of 1 Title: Exam 3 Started: August 7, 2008 1:59 PM Submitted: August 7, 2008 3:19 PM Time spent: 01:19:56 Total score: 17/20 = 85% Total score adjusted by 0.0 Maximum possible score: 20 1. The solubility of silver carbonate at a given temperature is 2.63 x 10 -7 M. Calculate the K sp at this temperature. Use E notation and give your answer to 3 significant figures. Student Response Valu e Correct Answer Answer 7.28E-20 100% 7.28E-20 (7.28 × 10 -20 ) Score: 1/1 2. What is the solubility in moles/liter for calcium fluoride at 25 o C given a K sp value of 4.0 x 10 -11 . Write using scientific notation and use 1 or 2 decimal places (even though this is strictly incorrect!) Student Response Valu e Correct Answer 1. 2.2E-4 100% Equals 2.15e-4 (100%) Equals 2.2e-4 (100%) General Feedback: K sp = 4S 3 Score: 1/1 3.
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What is the solubility of silver chloride (K sp = 1.1 x 10 -10 ) in a solution of 0.10 M magnesium chloride? Student Response Valu e Correct Answer Feedback a. 2.8 x 10 -9 100% b. 3.0 x 10 -4 0% c. 1.1 x 10 -9 0% d . 1.1 x 10 -8 0% e. 1.0 x 10 -5 0% Score: 0/1 4. 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 CaCl 2 and 1.0 x 10 -6 M AgNO 3 . Student Response Valu e 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%
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4. Q < K sp and a precipitate will form. 0%
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Exam 3-2 - View Attempt 1 of 1 Title: Exam 3 Started:...

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