S10E1A-AK - Multiple Choice(out of 90 Score(out of 10...

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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 2010 Friday, February 12 INSTRUCTIONS DO NOT TEAR ANY PAGES OFF YOUR EXAM 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. The answer key will be posted on the CourseWeb site. USEFUL INFORMATION HA + H 2 O A - + H 3 O + , K c = K a B + H 2 O BH + + OH - , K c = K b 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 K c = a b a w a K (acid-L) x K (base-L) K (acid-L) = K K (acid-R) ** Differentiate your Type 1, 2 and 3 problems ** Get to work on your B-I-K-E! GOOD LUCK
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ions ? All these species are soluble in water. *** Show your work or give your reasoning A) 0.2M NaCl B) 0.2M H 2 CO 3 C) 0.2M K 2 CO 3 D) 0.2M HClO 4 E) 0.2M NH 4 Br 2. What volume of a 0.260M solution of barium chloride contains 4.18 x 10 -3 mol of barium chloride? A) 31.1mL B) 0.935L C) 62.2L D) 1.09mL E) 0.311mL F) 8.04L G) 40.7mL H) 1070L I) 16.1mL J) 20.3L 3. Which one formula is NOT correct for the given name? A) Carbonic acid
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This note was uploaded on 02/20/2011 for the course CHEM 110 taught by Professor Dr.huston during the Spring '06 term at Pittsburgh.

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S10E1A-AK - Multiple Choice(out of 90 Score(out of 10...

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