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Unformatted text preview: patterns on Delft china. The Co(H2O)62+ ion is pale pink.
www.webassig n.net/ebooks/wsug encheml1/lab_9/manual.html 2/5 4/15/13 Lab 9 - Eq uilibr ium and Le Châtelier ' s Pr inciple You will be stressing these equilibria by adding products and reactants, and observing the color changes that
* Complex ions are formed when metals (usually transition metals) or their ions form covalent bonds
with molecules or ions that have electron pairs to donate. The electron donors, species such as H2O, NH3, and
halide anions, are called ligands. The electrons are shared between vacant d orbitals (or hybrid orbitals formed
from them) on the metal and nonbonding pairs on the ligand. There are usually vacant d orbitals in complex ions.
Visible light promotes electrons into these orbitals. Thus, complex ions absorb visible light, and have intense and
beautiful colors. Chapter 14 of your textbook has more information on the chemistry of transition metals. Equipment
2 30 mL beakers
1 100 mL beaker
1 ceramic spot plate
2 glass stir rods
1 hot plate
1 250 mL beaker for waste collection
1 deionized water squirt bott...
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This document was uploaded on 01/22/2014.
- Spring '14