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The following data were obtained when a Ca2+ ISE was immersed in standard solutions whose ionic strength was constant at 2.0 M. Ca2+ (M) E (mv) 3.27x 10-5 -75.1 3.27x10-4 -47.0 3.27x10-3 -18.8 3.27x 10-2 +9.30 3.27x10-1 +37.4 (a) Prepare a calibration curve and find the least-squares slope and intercept and their standard deviations. slope 428.13 4951.08 407 intercept Sy (b) The Nernst Equation tells us the equation values based on theory, but the data we collect in the lab often doesn't exactly agree with theory. Calculate the value of the slope correction value in the equation below. Response of Ca2+ electrode: E = constant + 0.05916log(ACa2+)(outside) (c) For a measured potential, the calibration curve gives us log [Ca²+ ]. We can compute [Ca²+] = 10log [Ca 2+ ]. Using rules for propagation of uncertainty in the Summary uncertainty for a sample that gave a reading of -23.8 ± 0.5 mV in four replicate measurements. Rules for Propagation Uncertainty table, calculate [Ca2+- M

The following data were obtained when a Ca2+ ISE was immersed in standard solutions whose ionic strength was constant at 2.0 M. Ca2+ (M) E (mv) 3.27x 10-5 -75.1 3.27x10-4 -47.0 3.27x10-3 -18.8 3.27x 10-2 +9.30 3.27x10-1 +37.4 (a) Prepare a calibration curve and find the least-squares slope and intercept and their standard deviations. slope 428.13 4951.08 407 intercept Sy (b) The Nernst Equation tells us the equation values based on theory, but the data we collect in the lab often doesn't exactly agree with theory. Calculate the value of the slope correction value in the equation below. Response of Ca2+ electrode: E = constant + 0.05916log(ACa2+)(outside) (c) For a measured potential, the calibration curve gives us log [Ca²+ ]. We can compute [Ca²+] = 10log [Ca 2+ ]. Using rules for propagation of uncertainty in the Summary uncertainty for a sample that gave a reading of -23.8 ± 0.5 mV in four replicate measurements. Rules for Propagation Uncertainty table, calculate [Ca2+- M

Chemistry
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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The following data were obtained when a Ca²+ ISE was immersed in standard solutions whose ionic strength was constant at 2.0 M. Ca 2+ (M) E (MV) 3.27x10-5 -75.1 3.27x10-4 -47.0 3.27x10-3 -18.8 3.27x10-2 +9.30 3.27x10-1 +37.4 (a) Prepare a calibration curve and find the least-squares slope and intercept and their standard deviations. 4.0 28.13 4.0✔ slope ± + 4.0✔✓ intercept Sy 4.0 51.08 4.0✔ (b) The Nernst Equation tells us the equation values based on theory, but the data we collect in the lab often doesn't exactly agree with theory. Calculate the value of the slope correction value ß in the equation below. 0.05916 V 2 Response of Ca²+ electrode: E = constant + B(- 6 Vlog(ACa2+)(outside) 4.0✔ (c) For a measured potential, the calibration curve gives us log [Ca²+ ]. We can compute [Ca²+] = 10log [Ca²+1. Using rules for propagation of uncertainty in the Summary of Rules for Propagation of Uncertainty table, calculate [Ca²+] and its associated uncertainty for a sample that gave a reading of -23.8 ± 0.5 mV in four replicate measurements. 4.0 ± 4.0✔ M
Transcribed Image Text:The following data were obtained when a Ca²+ ISE was immersed in standard solutions whose ionic strength was constant at 2.0 M. Ca 2+ (M) E (MV) 3.27x10-5 -75.1 3.27x10-4 -47.0 3.27x10-3 -18.8 3.27x10-2 +9.30 3.27x10-1 +37.4 (a) Prepare a calibration curve and find the least-squares slope and intercept and their standard deviations. 4.0 28.13 4.0✔ slope ± + 4.0✔✓ intercept Sy 4.0 51.08 4.0✔ (b) The Nernst Equation tells us the equation values based on theory, but the data we collect in the lab often doesn't exactly agree with theory. Calculate the value of the slope correction value ß in the equation below. 0.05916 V 2 Response of Ca²+ electrode: E = constant + B(- 6 Vlog(ACa2+)(outside) 4.0✔ (c) For a measured potential, the calibration curve gives us log [Ca²+ ]. We can compute [Ca²+] = 10log [Ca²+1. Using rules for propagation of uncertainty in the Summary of Rules for Propagation of Uncertainty table, calculate [Ca²+] and its associated uncertainty for a sample that gave a reading of -23.8 ± 0.5 mV in four replicate measurements. 4.0 ± 4.0✔ M
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