A copper concentration cell is set up with the cathode half-cell contains 1.0 M CuSO4 solution and the anode half-cell contains Cu2+ of unknown concentration. The two half-cells are connected by a salt-bridge containing Na2SO4. When the two copper electrodes are connected to a voltmeter, it shows a cell potential of 0.284 V. What is the concentration of Cu2+ in the anode half-cell?

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