Exam 1 - Spring 2008

Exam 1 - Spring 2008 - Multiple Choice (out of 90) * Score...

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Multiple Choice *** Score Total (out of 90) (out of 10) (out of 100) Name ________________________ Signature ____________________ Chem 0120 - Golde Exam I Spring Term 2008 Friday, February 15 INSTRUCTIONS DO NOT TEAR ANY PAGES OFF YOUR EXAM EXCEPT THE PERIODIC CHART PRINT AND SIGN YOUR NAME AT THE TOP OF THIS PAGE. The exam contains 15 multiple-choice questions (6 points each) to be answered on the machine-scored sheet, using a soft pencil. Be sure to write and code in your name (last name, space, first name) on this sheet. Do all your working on the exam sheets. *** The last 10 points will be given for your written answers to questions marked *** in the exam. An answer key will be available in Room 101 after the exam (about 12:15 – 12:30pm). The answer key will also be posted on the Blackboard CourseWeb site. USEFUL INFORMATION HA + H 2 O A - + H 3 O + , K c = K a H 2 O + H 2 O H 3 O + + OH - , K c = K w K w = 1.00 x 10 -14 pH = -log 10 [H 3 O + ] [ ] = Molar concentration M = mol/L For ax 2 + bx + c = 0, x = - ± - b b ac a 2 4 2 K a (H 2 O) = K b (H 2 O) = 1.0 x 10 -14 ; K a (H 3 O + ) = 1; K b (OH - ) = 1 HA + B A - + HB + : K c = a b w K of HA x K of B K **A Periodic Chart is attached ** Get to work on your B-I-K-E! GOOD LUCK
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1. Determine the mass of CaCl 2 solid required to prepare a 350.0mL solution of 0.0615M CaCl 2 . a) 23.0g b) 70.0g c) 19.5g d) 21.5g e) 18.0g f) 8.74g g) 2.39g h) 6.83g i) 3.32g j) 38.8g 2. Ionic compounds split into their ions when dissolved in water. Which set of ions is completely correct for the given ionic compound? a) CuSO 4 (copper sulfate) Cu + + SO 4 - b) LiHCO 3 (lithium bicarbonate) Li + + HCO 3 - c) BaCl 2 (barium chloride) Ba + + Cl 2 - d) NaH 2 PO 4 (sodium dihydrogen phosphate) Na + + 2H + + PO 4 3- e) HCOOK (potassium formate) H + + COOK - 3. At a certain temperature, the following reaction has an equilibrium constant, K c
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Exam 1 - Spring 2008 - Multiple Choice (out of 90) * Score...

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