Chem practice test

chem practice test
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Unformatted text preview: View Attempt 1 of 1 Title: Practice Test 1 Started: February 18, 2008 10:36 PM Submitted: February 18, 2008 11:31 PM Time spent: 00:55:06 Total score: 16/20 = 80% Total score adjusted by 0.0 Maximum possible score: 20 1. IMF in solution 50 What is the strongest form of intermolecular force between solute and solvent in a solution of C 2 H 6 (g) in benzene, C 6 H 6 (l)? Student Response Value Correct Answer Feedback 1. ion-dipole 0% 2. dipole- dipole 0% 3. hydrogen bonding 0% 4. dipole- induced dipole 0% 5. dispersion 100% Score: 1/1 2. Relative Solubility 22 Which of the following is more soluble in water, methanol or CBr 2 H 2 (l). Don't try to type the subscripts, just use letters and numbers. Student Response Value Correct Answer 1. CH3OH 0% Equals methanol (100%) Score: 0/1 3. Chapter 8 Molality 7 Determine the molality of a solution prepared by dissolving 9.78 g of cycloheptane in 71.3 g of benzene. Student Response Value Correct Answer Answer .140 0% 1.40 Page 1 of 8 View Attempt 2/18/2008 http://scholar.uh.edu/webct/urw/lc179937921.tp179937934/ViewStudentAttempt.dowebct... Score: 0/1 4. Chapter 8 PC to Molar 1 A 4.20 mass % aqueous solution of sodium chloride has a density of 1.00 g/mL. Calculate the molarity of the solution. Student Response Value Correct Answer Answer .7186 100% 0.72 Score: 1/1 5. Ionic Dissociation 1 Describe sodium permanganate (NaMnO 4 ) as a strong electrolyte, weak electrolyte,or non- electrolyte. Student Response Value Correct Answer 1. strong 100% Equals strong electrolyte (100%) Equals strong (100%) Score: 1/1 6. General Properties Comparison 3 Consider the solutions, 0.04 m urea [(NH 2 ) 2 C=O)], 0.04 m AgNO 3 and 0.04 m CaCl 2 . Which has (i) the highest osmotic pressure, (ii) the highest vapor pressure, (iii) the highest boiling point? Student Response Value Correct Answer Feedback 1. (a) 0.04 m CaCl 2 (b) 0.04 m CaCl 2 (c) 0.04 m CaCl 2 0% 2. (a) 0.04 m CaCl 2 (b) 0.04 m urea (c) 0.04 m CaCl 2 100% 3. (a) 0.04 m urea 0% Page 2 of 8 View Attempt 2/18/2008 http://scholar.uh.edu/webct/urw/lc179937921.tp179937934/ViewStudentAttempt.dowebct... (b) 0.04 (b) 0....
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