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Unformatted text preview: City College, Chemistry Department Chemistry 10301, sections T and T2, Prof. T. Lazaridis Second Midterm exam, Nov. 2, 2006 Name (last name first): ___________________________________ I.D. Number: ____________________________________________ Workshop leader:________________________________________ Note: There are 7 questions in this exam (check both sides of the sheet). Fill in your answer in the blank space provided immediately following each question. 1/2 point will be subtracted every time you report a numerical result with an incorrect number of significant figures. The last sheet of this exam contains information that may or may not be needed to answer these questions. 1. (20) a. (6) Predict whether each the following compounds is soluble in water: K 3 PO 4 Soluble Not Soluble BaSO 4 Soluble Not Soluble NaClO 4 Soluble Not Soluble b. (4) What is the molarity of a solution that contains 0.0345 mol NH 4 Cl in 400 mL of solution? 0.0345 mol / 400 X 10-3 L = 0.0863 M c. (5) Which element is oxidized and which is reduced in the following reaction? Ni (s) + Cl 2 (g) --> NiCl 2 (s) Ni goes from O.N. 0 to +2 so it is oxidized....
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- Spring '11
- Chemistry, mol, City College, Prof. T. Lazaridis