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Essay Details:
Essay text:
Using Beer’s Law in this lab a colorimeter is used to find the absorbance and from this the concentration of dissolved Cu2+ ions can be found and percent mass calculated. The techniques used in this lab are useful in that they provide little human error for various parts of the lab by taking the measurements by a colorimeter human error is reduced.
Experimental Procedure
Equations Used
M1V1=M2V2, Beers Law: A=elc+b, Morality= M = (mols of solute)/ (Liters of Solution)
Reaction: 3Cu(s) + 8 H3O+ (aq) + 2NO3- (aq) ? 3Cu2+(aq) + 2NO (g) + 12 H2O (l)
Cu(s) + 4 H3O+ (aq) + 2NO3- (aq) ? Cu2+(aq) + 2NO2 (g) + 6 H2O (l)
Zn (s) + 2H3O+ (aq) ? Zn2+ (aq) + 2H2O(l) + H2 (g)
First weigh a post 1982 penny...
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