State what is the concentration of zn

Reference no: EM13188374

A 10.00 ml solution of zn^2+ of unknown concentration was mixed with 25.00 mL test reagent (a known excess) and diluted to a final total volume of 200 ml to produce a colored solution having an Absorbance of 0.104 at a certain wavelength. A second solution was prepared by mixing 10.00 ml unknown Zn^2+ solution, 3.00ml 1.00 x 10^-3M Zn^2+ standard, 25.00 ml test reagent, and brought to a final volume of 200 ml. This solution gave an absorbance=0.550 under the same conditions of measurement as before. What is the concentration of Zn^2+ in the original 10.00 ml unknown?

Reference no: EM13188374

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