A conductivity cell filled with 0.1 M KCI at 25°C has a measured resistance of 24.36 2. The conductivityof KCI at this concentration is 116.39 cm²/2-mol. When the cell was filled with 0.01 M acetic acid,the cell resistance was found to be 1982 at 25°C. Calculate the molar conductance of the acetic acidin 2-1 cm² mol-1.

1. Calculate the cell constant (K) using KCl:Where:Calculate the conductivity of the acetic acid…

Answered: A conductivity cell filled with 0.1 M…

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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Calibration of a glass electrode gave a reading of 139.3 mV with a 0.05 m potassium hydrogen phthalate buffer standard ( pH = 4.015), and a reading of -160.7 mV with a 0.01 m borax buffer standard (pH = 9.139), both measured at 30 °C. What is the observed slope (mV/pH unit) of the calibration curve? slope observed What is the theoretical slope at 30 °C? = slope theoretical pH : What is the pH of an unknown that gives a reading of 42.5 mV with this electrode at 30 °C? = = mV/pH mV/pH
Calibration of a glass electrode gave a reading of 134.9 mV with a 0.05 m potassium hydrogen phthalate buffer standard ( pH = 4.015), and a reading of -69.1 mV with a 0.08 m HEPES, 0.08 m NaHEPES, 0.08 m NaCl buffer standard (pH = 7.454), both measured at 30 °C. What is the observed slope (mV/pH unit) of the calibration curve? slope observed slope theoretical What is the theoretical slope at 30 °C? pH -58.1 5.29 Incorrect What is the pH of an unknown that gives a reading of 41.4 mV with this electrode at 30 °C? Incorrect Incorrect mV/pH mV/pH
Calculate the cell potential (in V) of the following cell with transference at 25°C: Pb(s) PbSO4(s), CuSO4(m = 0.2, y = 0.110) CuSO4(m = 0.02, y = 0.320), PbSO4(s) Pb(s) The transport number of Cu²+ is 0.370. Express your answer in three significant figures.
4. The standard electromotive force of the cell Pt(s) H2(g)|HCl(aq)|AgCl(s)|Ag(s) has been determined from 0°C to 90°C, and the data were found to fit the expression E*/V = 0.237-4.856 × 10-4T(°C) - 3.421 × 10-T²(°C) + 5.869 × 10-ºT³ (°C) Calculate the equilibrium constant, the standard reaction Gibbs energy, entropy and enthalpy for the cell reaction at 25°C. F = 96485 C mol-¹ AgCl(s) + H2(g) → Ag(s) + HCl(aq)
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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