Parr_105a_Sum_2008_Exam 2 key

Parr_105a_Sum_2008_Exam 2 key - Chemistry 105 A Exam 2...

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Chemistry 105 A PLEASE PRINT YOUR NAME IN BLOCK LETTERS Exam 2 Name: __________________________________ 06/09/08 Last 4 Digits of USC ID:____ ____ ____ ____ Dr. Jessica Parr Lab TA’s Name: _________________________________ Question Points Score Grader 1 10 2 10 3 10 4 8 5 12 6 8 7 10 8 12 9 6 10 14 Total 100 Please Sign Below: I certify that I have observed all the rules of Academic Integrity while taking this examination. Signature: _______________________________________________________________ Instructions: 1. You must show work to receive credit. 2. If necessary, please continue your solutions on the back of the preceding page (facing you). 3. YOU MUST use black or blue ink. (No pencil, no whiteout, no erasable ink.) 4. There are 10 problems on 11 pages. Please count them before you begin. A periodic table and some useful equations can be found on the last page. 5. Good luck!! =) First Letter of last Name
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1. (10 pt) Predict the precipitate formed when solutions of the two ionic compounds are mixed together, if no precipitate is formed write “no reaction”. a. Na 2 CO 3 and Pb(NO 3 ) 2 _______________ b. KOH and MgCl 2 _______________ c. Hg 2 (NO 3 ) 2 and CuSO 4 _______________ d. Cu(NO 3 ) 2 and BaI 2 _______________ e. Na 2 CrO 4 and AlBr 3 _______________ 2. (10 pt) Assign oxidation states to phosphorous in each of the following compounds or molecules or ions: a. P 2 O 4 _______________ b. P 5 O 10 _______________ c. PO 4 3- _______________ d. Li 3 P _______________ e. Mg 2 P 2 O 7 _______________
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reaction method. Be sure to include all states and charges in the balanced reaction. S
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This note was uploaded on 07/14/2008 for the course CHEM 105A taught by Professor Bau during the Summer '04 term at USC.

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Parr_105a_Sum_2008_Exam 2 key - Chemistry 105 A Exam 2...

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