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Calibration of a glass electrode gave a reading of 129.7 mV with a saturated potassium hydrogen tartrate buffer standard ( pH = 3.557), and a reading of –98.7 mV with a 0.008695 m potassium dihydrogen phosphate, 0.0343 m disodium hydrogen phosphate buffer standard (pH = 7.400), both measured at 30 °C. What is the observed slope (mV/pH unit) of the calibration curve? slopeobserved mV/pH What is the theoretical slope at 30 °C? slope heoretical mV/pH What is the pH of an unknown that gives a reading of 18.5 mV with this electrode at 30 °C? pH = II

Calibration of a glass electrode gave a reading of 129.7 mV with a saturated potassium hydrogen tartrate buffer standard ( pH = 3.557), and a reading of –98.7 mV with a 0.008695 m potassium dihydrogen phosphate, 0.0343 m disodium hydrogen phosphate buffer standard (pH = 7.400), both measured at 30 °C. What is the observed slope (mV/pH unit) of the calibration curve? slopeobserved mV/pH What is the theoretical slope at 30 °C? slope heoretical mV/pH What is the pH of an unknown that gives a reading of 18.5 mV with this electrode at 30 °C? pH = II

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Calibration of a glass electrode gave a reading of 129.7 mV with a saturated potassium hydrogen tartrate buffer standard ( pH = 3.557), and a reading of -98.7 mV with a 0.008695 m potassium dihydrogen phosphate, 0.0343 m disodium hydrogen phosphate buffer standard (pH = 7.400), both measured at 30 °C. What is the observed slope (mV/pH unit) of the calibration curve? slopeobserved = mV/pH What is the theoretical slope at 30 °C? slope heoretical mV/pH What is the pH of an unknown that gives a reading of 18.5 mV with this electrode at 30 °C? pH =
Transcribed Image Text:Calibration of a glass electrode gave a reading of 129.7 mV with a saturated potassium hydrogen tartrate buffer standard ( pH = 3.557), and a reading of -98.7 mV with a 0.008695 m potassium dihydrogen phosphate, 0.0343 m disodium hydrogen phosphate buffer standard (pH = 7.400), both measured at 30 °C. What is the observed slope (mV/pH unit) of the calibration curve? slopeobserved = mV/pH What is the theoretical slope at 30 °C? slope heoretical mV/pH What is the pH of an unknown that gives a reading of 18.5 mV with this electrode at 30 °C? pH =
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