Quiz Two Answer Key

Quiz Two Answer Key - Quiz Two Answer Key Harman, Chem...

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Quiz Two – Answer Key Harman, Chem 141/152 September 27, 2006 1. D. While carbonate, phosphate, and magnesium ions are usually insoluble, the counterions are exceptions that are always soluble – ammonium, potassium, and iodide. 2. A. CH 3 NH 2 The general trend is that atoms gets more basic as you go from F to O to N, and so the basic N makes CH 3 NH 2 the most basic molecule or ion listed. 3. C. FeCl 2(aq) + (NH 4 ) 2 SO 3(aq) Fe(SO 3 ) + 2 NH 4 + (aq) + 2 Cl - (aq) iron(II) means Fe 2+ and sulfite is SO 3 2- 4. A: LiF. Lattice energy increases with higher charge and smaller size. Since all the ions here have a charge of –1 or +1, size is the most important and Li + is the smallest cation and F - is the smallest anion there. 5. B. each Na: +1 each O: -2 to have overall zero charge, the As must be +3 3(+1) + 3 + 3(-2) = 0 6. D. The three bonds to fluorine cancel each other out and so BF 3 has no net dipole moment. 7.
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This note was uploaded on 01/28/2009 for the course CHEM 151 taught by Professor Metcalf during the Fall '05 term at UVA.

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Quiz Two Answer Key - Quiz Two Answer Key Harman, Chem...

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