AP Chemistry Other Equilibria WS 0809Key

AP Chemistry Other Equilibria WS 0809Key - 2+ ][SO 4 2-] =...

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Answer Key Note: This is a “quick” answer key that is very short (read “none”) on details. I also calculated these very quickly to make them available to you and as such, expect possible errors (hopefully minimal). Please see me on Monday if you want details or you suspect an answer may be wrong. Thanks. 1. a. K sp = [Ag + ][Cl - ] b. K sp = [Hg 2 2+ ][Cl - ] 2 c. K sp = [Pb 2+ ] 3 [AsO 4 3- ] 2 2. K sp = [Ca 2+ ][C 2 O 4 2- ] = (4.8x10 -5 )(4.8x10 -5 ) = 2.3x10 -9 3. K sp = [Pb 2+ ][I - ] 2 = (1.2x10 -3 )[(2)(1.2x10 -3 )] 2 = 6.9x10 -9 4. 0.67g/L 5. 1.5x10 -8 M. In pure water it is over 3,000 times more soluble 6. Q c = [Ba
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Unformatted text preview: 2+ ][SO 4 2-] = (5.0x10-4 )(5.0x10-5 ) = 2.5x10-8 The ion product is greater than the solubility product (1.1x10-10 ) so precipitation is expected. 7. HSO 4-is a much stronger acid than HCO 3-(check K a values) Calcium carbonate is much more soluble in acidic solution whereas the solubility of calcium sulfate is only slightly affected. 8. pH = 2.55; ascorbate ion = K a2 = 1.6x10-12 9. pH = 10.04 10. pH = 8.92 11. pH = 9.43 12. pH = 9.21 13. pH = 1.368 14. a. A precipitate should form b. No precipitate should form...
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This note was uploaded on 12/07/2011 for the course CHEM 100 taught by Professor Feebeck during the Fall '10 term at Purdue University-West Lafayette.

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