Calculate the equilibrium electrical membrane potentials corresponding to the following extracellular and intracellular concentrations of ions at 20 °C. Assume permeability of the 2+ membrane for one type of ion only (e.g. K* for V, Ca for V. and H for V, K' Ca

Calculate the equilibrium electrical membrane potentials corresponding to the following extracellular and intracellular concentrations of ions at 20 °C. Assume permeability of the 2+ membrane for one type of ion only (e.g. K* for V, Ca for V. and H for V, K' Ca

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter12: Solutions

Section: Chapter Questions

Problem 12.39QE: The density of a 3.75 M aqueous sulfuric acid solution in a car battery is 1.225 g/mL. Express the...

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Concept explainers

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.

Question

Calculate the equilibrium electrical membrane potentials corresponding to the following
extracellular and intracellular concentrations of ions at 20 °C. Assume permeability of the
2+
membrane for one type of ion only (e.g. K* for V, Ca for V and H for V)
K'
Са
lonic Species
Intracellular Extracellular Equilibrium Potential
Potassium (K )
150 mM
4 mM
V, = ?mV
K
2+
Calcium (Ca)
2 mM
V = ? mV
70 nM
%3D
Са
Hydrogen ion (proton, H)
pH 7.2
pH 7.4
V, = ? mV

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