Question: Given the following calibration curve data recorded from a Ca-ion selective electrode. The unknown and samples have a TISAB buffer (1 MKCl) added to prevent

Given the following calibration curve data recorded from a Ca-ion selective electrode. The unknown and samples have a TISAB buffer (1 MKCl) added to prevent changes in the ionic strength impacting the results. If the potential of an unknown Ca+2 solution is E vs REf=21.21 Assume the original unknown sample was diluted by the following: A 8 aliquot of the original unknown was diluted to a total volume of 78mL. Report the original concentration of Ca in ppm Ca to 3 decimal places

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