Exam 1-solutions - Version 573 Exam 1 Laude(52390 This print-out should have 29 questions Multiple-choice questions may continue on the next column or

Exam 1-solutions - Version 573 Exam 1 Laude(52390 This...

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Version 573 – Exam 1 – Laude – (52390) 1 This print-out should have 29 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 6.0 points What would be the pH of a solution of hypo-bromous acid (HOBr) prepared by dissolving9.7 grams of the acid in 20 mL of pure wa-ter (H2O)? The Ka of hypobromous acid is 6.0 points Rank following salts from most to least solu- ble: BiI K sp = 7 . 7 × 10 19 Cd 3 (AsO 4 ) 2 K sp = 2 . 2 × 10 33 AlPO 4 K sp = 9 . 8 × 10 21 CaSO 4 K sp = 4 . 9 × 10 5 1. AlPO 4 < BiI < Cd 3 (AsO 4 ) 2 < CaSO 4 correct Molar solubility can be approximated by taking the n th root of the K sp where n is the number of ions in the salt. Doing so results in approximate molar solubilities of 10 10 , 10 7 , 10 11 and 10 3 for bismuth iodide, cadmium arsenate, aluminum phosphate and calcium sulfate, respectively. Arranging these from least to greatest produces: AlPO 4 < BiI < 4.0036.0 pointsDetermine the molar solubility of calciumchloride (CaCl2) if 1. 9 correct 2. 5 3. 1 4. 13 5. 10.5
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Version 573 – Exam 1 – Laude – (52390) 2 0056.0 pointsConsider the following exothermic reaction:CaO(s) + CO2(g)←→CaCO3(s)In response to a decrease in temperature, thesystem would: 0066.0 pointsConsider the reaction,Na+(aq) + Cl(aq)←→NaCl(aq)The equilibrium constant,K, is 2.If theconcentrations of Na+, Cland NaCl are 2, 2and 10 M, respectively, which of the followingwould occur?
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