A Zn^2+/Zn half cell was placed inside a beaker with a Cu^2+/Cu half cell and was hooked up to a voltmeter to record the voltage. 3 mL of 6 M Cu^2+ solution was added until a deep blue Cu(NH3)4^2+ complex ion was obtained and a voltage reading was recorded. Based on this information how can I use the experimental standard cell potential, experimental nonstandard cell potential, and 0.10 M of zinc to determine the concentration of copper in the solution?