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CHEMISTRY 121 1 Department of Chemistry University of British Columbia Problem Set 1 Review This problem set is a review of basic chemistry which forms the background for the material covered in this course. 1. What is a reducing agent? 2. What is the oxidation state of phosphorus in Mg 2 [P 2 O 7 ]? 3. Balance the following reaction in basic solution: __Zn (s) + __[NO 3 ] - (aq) __[ZnO 2 ] 2- (aq) + __NH 3(aq) 4. What is the oxidation state of nitrogen in: (a) the nitrate ion? (b) the nitrite ion? 5. What is the oxidation state of phosphorus in Na[H 2 PO 2 ]? 6. Give a balanced half reaction for the reduction of nitrate to nitric oxide in acidic solution. 7. Balance the following reaction in acidic solution: __CuS (s) + __[NO 3 ] - __Cu 2+ (aq) + __S 8(s) + __NO (g)
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CHEMISTRY 121 2 Department of Chemistry University of British Columbia 8. A solid piece of aluminum (51.0 g) was added to a solution of sodium hydroxide (84.1 g) in water. A balanced equation for this reaction is shown below:
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