By how many volts will the potential of an ideal Mg2+ ion selective electrode (ISE) change if the electrode is removed from a 1.0 x 10-4 M solution of MgCl2 and placed in 1.0 x 10-3 M MgCl2?
By how many volts will the potential of an ideal Mg2+ ion selective electrode (ISE) change if the electrode is removed from a 1.0 x 10-4 M solution of MgCl2 and placed in 1.0 x 10-3 M MgCl2?
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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- By how many volts will the potential of an ideal Mg2+ ion selective electrode (ISE) change if the electrode is removed from a 1.0 x 10-4 M solution of MgCl2 and placed in 1.0 x 10-3 M MgCl2?
- 28 mL of 0.1M Ce4+ is mixed with 50 mL of 0.05M Fe2+. The solution potential is monitored with a Pt indicator electrode and an Ag/AgCl reference electrode. Calculate the potential of the Pt electrode and the cell potential.
- An ion selective electrode for NO2- has the following values of Log k for the listed interferents.
Interferent Logk
F- -3.1
SO42- -4.1
I- -1.2
NO3- -3.3
Which ion is the most serious interferent? Why? For what activity of this interferent is the potential (E) equivalent to a solution in
which aNO2- = 2.75 x 10-4 ?
- A glass and calomel electrode system was found to develop a potential of -0.0412V when dipped into a pH 6.00 buffer. When in an unknown solution, the cell potential was found to be -0.2004 V. Calculate the pH and the activity of hydrogen ion in the unknown solution.
- Suppose that when the cell potential for the unknown solution in # 3 was measured, the voltage reading was unstable and the values ranged from -0.1950 to -0.2020 V. Based on these data, estimate S/N for that electrode measurement system. Use absolute values in your calculation.
- A bare silver wire electrode is dipped into a solution 0.05M in KNO3 (supporting electrolyte) and saturated in AgBr (Ksp = 5.0 x 10-13), and connected to the back of an mV/pH meter along with a saturated calomel reference electrode. Calculate the potential of the silver indicator electrode. Calculate the cell potential.
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