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Unformatted text preview: Cu(NH 3 ) 4 2+ Cu 2+ + 4NH 3 initial .0083 M M .47 M-3.6e-14 M +3.6e-14 M 1.5e-13 M equilibrium .0083 M 3.6e-14 M .47 M What percentage of the original Cu 2+ is still present as free Cu 2+ after addition of the NH 3 ? 4.4e-10 % So, how good was the original assumption that all the Cu 2+ would be present as Cu(NH 3 ) 4 2+ ? The assumption was poor but it made the calculations easier. The assumption was ok and should not affect the results. The assumption was very good! This does not indicate how good the assumption was; more tests are needed....
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This note was uploaded on 03/18/2011 for the course CHEM 202 taught by Professor Feducia during the Spring '09 term at N.C. State.
- Spring '09