Analytical Chemistry: 23. What would be the ideal slope for an ion selective electrode at 25℃ for the following ions a. Cl- b. Fe3+
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Analytical Chemistry: 23. What would be the ideal slope for an ion selective electrode at 25℃...
An ammonium ion selective electrode exhibits interference from lithium ions with a selectivity coefficient of 0.2. If a 0.10 M solution of ammonium has an electrode potential of 0.125 V what is the expected potential in a solution containing both 0.1 M ammonium and 0.1 M lithium? Recall that the Nernst equation for a cation selective electrode with interferent is Ecell L'002 Logho(a + Kb) where a and b are the activities(-concentrations) of the selective ion and interfering ion, respectively.
7) An ion selective electrode and reference electrode pair were placed in 100.00 mL of the sample, and a reading of 21.6 mV was obtained. After the addition of 10.00 mL of a standard solution with a concentration of 100 ug/mL, the electrode pair gave a reading of 43.7 mV. The response slope (i.e., the slope of the line give by the equation E=mx+ constant, where x = log[ion]) was previously determined to be 57.8 mV. What is the sample...
7. (10 points) a) The selectivity coefficient for a Bromide ion-selective electrode is on 0.15. What will the change in the electrode potential be for a 1.4 x 10" M Br" at pH 5.5 if the pH is raised to pH 11.0? b) A PH probe is calibrated against pH 4 and pH 7 buffers. For pH 4 buffer, E = 200 mV and for pH 7 buffer, E = 23 mV. If the potential for an unknown solution is...
When an ion-selective electrode for X was immersed in 0.0680 M XCl, the measured potential was 0.0220 V. What is the concentration of X when the potential is 0.0370 V? Assume that the electrode follows the Nernst equation, the temperature is at 25
When an ion‑selective electrode for X+ was immersed in 0.0709 M XCl, the measured potential was 0.0430 V . What is the concentration of X+ when the potential is 0.0580 V ? Assume that the electrode follows the Nernst equation, the temperature is at 25 °C, and that the activity coefficient of X+ is 1.
When an ion‑selective electrode for X+ was immersed in 0.0652 M XCl, the measured potential was 0.0420 V . What is the concentration of X+ when the potential is 0.0570 V ? Assume that the electrode follows the Nernst equation, the temperature is at 25 °C, and that the activity coefficient of X+ is 1.
When an ion‑selective electrode for X+ was immersed in 0.0312 M XCl, the measured potential was 0.0230 V . What is the concentration of X+ when the potential is 0.0380 V ? Assume that the electrode follows the Nernst equation, the temperature is at 25 °C, and that the activity coefficient of X+ is 1.
When an ion-selective electrode for X was immersed in 0.0470 M XCI, the measured potential was 0.0340 V. What is the concentration of X when the potential is 0.0490 V? Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1 Number
When an ion-selective electrode for X+ was immersed in 0.0784 M XCI, the measured potential was 0.0430 V. What is the concentration of X* when the potential is 0.0580 V? Assume that the electrode follows the Nernst equation, the temperature is at 25 °C, and that the activity coefficient of X* is 1. x]0.117
When an ion-selective electrode for X was immersed in 0.0520 M XCI, the measured potential was 0.0380 V. What is the concentration of X when the potential is 0.0530 V? Assume that the electrode follows the Nemst equation, the temperature is at 25 C, and that the activity coefficient of X* is 1 Number 0.3M