The following data were obtained when a Ca²+ ion-selective electrode was immersed in a series of standard solutions. (Note: for this question you may assume the activity coefficient of Ca is unity and concentration equals activity) [Ca²+] (M) 3.38E-5 3.38E-4 3.38E-3 3.38E-2 3.38E-1 E (mv) This data produced the following calibration curve. 60 40 20 0 -40 -60 -80 -100 E (mV) -74.8 -46.4 -18.7 in 10.0 37.7 y = 28.14x + 51.096 log10[Ca2+] -1 0 Calculate the concentration of calcium in a sample that gave a reading of -72.8 mV. Answer using scientific notation with 3 significant digits (e.g. 3.14E-4). Be sure to include units in your answer.

The following data were obtained when a Ca²+ ion-selective electrode was immersed in a series of standard solutions. (Note: for this question you may assume the activity coefficient of Ca is unity and concentration equals activity) [Ca²+] (M) 3.38E-5 3.38E-4 3.38E-3 3.38E-2 3.38E-1 E (mv) This data produced the following calibration curve. 60 40 20 0 -40 -60 -80 -100 E (mV) -74.8 -46.4 -18.7 in 10.0 37.7 y = 28.14x + 51.096 log10[Ca2+] -1 0 Calculate the concentration of calcium in a sample that gave a reading of -72.8 mV. Answer using scientific notation with 3 significant digits (e.g. 3.14E-4). Be sure to include units in your answer.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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