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Test3b_Spring_2009

# Test3b_Spring_2009 - View Attempt 1 of 1 Title Started...

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View Attempt 1 of 1 Title: Exam 3 Started: April 28, 2009 8:46 AM Submitted: April 28, 2009 9:52 AM Time spent: 01:05:53 Total score: 18/20 = 90% Total score adjusted by 0.0 Maximum possible score: 20 1. Chapter 11 Ksp S 2 What is the solubility in moles/liter for barium sulfate at 25 o C given a K sp value of 1.1 x 10 -10 . Write using scientific notation and use 1 or 2 decimal places (even though this is strictly incorrect!) Student Response Value Correct Answer 1. 1.0E-5 100% Equals 1.05e-5 (100%) Equals 1.1e-5 (100%) Equals 1.0e-5 (100%) General Feedback: K sp = S 2 Score: 1/1 2. CIE 2 What is the solubility of silver iodide (K sp = 8.3 x 10 -17 ) in a solution of 0.15 M magnesium iodide? Student Response Value Correct Answer Feedback a. 2.8 x 10 - 16 100% b. 2.7 x 10 -6 0% c. 5.5 x 10 - 16 0%

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