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1 Department of Chemistry University of British Columbia Problem Set 7 p-Block Elements 1. A zeolite containing alkali metal ions (M) has the formula M n [(AlO 2 ) 2 (SiO 2 ) 4 ]. What is n to preserve electrical neutrality ? 2. Which crown ether would you expect to complex Ca 2+ most strongly: (a) 12-crown-4 (b) 15-crown-5 (c) 18-crown-6 (d) 21-crown-7 3. For each of the following guests in 18-crown-6 select all of the interactions involved in stabilizing the complex from the following: (1) London forces; (2) hydrogen bonding; (3) dipole-dipole interactions; (4) ion-dipole interactions. (a) water (b) K + (c) NH 4 + 4. If the alkali metal in the zeolite in question 1 were exchanged with an alkaline earth metal, what would n have to be to preserve electrical neutrality? 5-8. For questions 5-8 below, use the following answer choices: (a) silica (b) silicone (c) silicon (d) none of these 5. Which has the formula SiO 2 ? 6.
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This note was uploaded on 11/03/2009 for the course ECON 210 taught by Professor James during the Spring '09 term at UBC.

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