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Unformatted text preview: . Let [Cu2+]std = molar concentration in standard = 0.0287 M
[Cu2+]unk = molar concentration in unknown
Vstd = volume of standard = 0.500 mL
Vunk = volume of unknown = 25.0 mL
Sunk = signal for unknown = 23.6
Sunk+std = signal for unknown plus standard = 37.9 Assuming that the signal is proportional to concentration,
Sunk = k [Cu2+]unk and k = Sunk / [Cu2+]unk and after addition of the standard Substituting for k and rearranging gives...
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This document was uploaded on 03/06/2014 for the course CHEM 422 at CSU Northridge.
- Fall '08