To determine the concentration of copper II ions in the wastewater sample using the polarographic method, we need to use the Randles-Sevcik equation:i_p = 2.69 x 10^5 * n^3/2 * A * D^1/2 * v^1/2 * Cwhere:i_p = peak current 2.5 mA n = number of electrons involved in the redox reaction for Cu2+ Cu, n = 2 A = electrode area we need this value to proceed D = diffusion coefficient of the analyte we need this value to proceed v = scan rate 50 mV/s C = concentration of the analyte Cu2+ ions First, we need to convert the scan rate from mV/s to V/s:v = 50 mV/s * 1 V / 1000 mV = 0.05 V/sNow, we need the electrode area A and the diffusion coefficient D to proceed. These values are typically obtained from calibration experiments or literature sources. Assuming we have these values, we can rearrange the Randles-Sevcik equation to solve for the concentration C :C = i_p / [ 2.69 x 10^5 * n^3/2 * A * D^1/2 * v^1/2]Once you have the values for A and D, you can plug them into the equation and calculate the concentration of copper II ions in the wastewater sample.