When measured with a F− ion-selective electrode with a Nernstian response at 25°C, the potential due to F− in unfluoridated groundwater in a nearby city was 40.7 mV more positive than the potential of tap water in a distant city. The distant city maintains its fluoridated water at the recommended level of 1.00 ± 0.05 mg F−/L. What is the concentration of F− in mg/L in groundwater in the nearby city? (Disregard the uncertainty. Assume that the Nernst potential is 0.05916 V.)

When measured with a F− ion-selective electrode with a Nernstian response at 25°C, the potential due to F− in unfluoridated groundwater in a nearby city was 40.7 mV more positive than the potential of tap water in a distant city. The distant city maintains its fluoridated water at the recommended level of 1.00 ± 0.05 mg F−/L. What is the concentration of F− in mg/L in groundwater in the nearby city? (Disregard the uncertainty. Assume that the Nernst potential is 0.05916 V.)

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

ChapterA1: Evaluation Of Analytical Data

Section: Chapter Questions

Problem A1.23QAP

See similar textbooks

Similar questions

Calculate the electrode potentials for the following systems: (a) Cr2O72-(5.00 10-3 M),Cr3+(2.50 10-2 M),H+ (0.100 M)|Pt (b) UO22+(0.100 M),U4+ (0.200 M),H+ (0.600 M)|Pt
When measured with a Fion-selective electrode with a Nernstian response at 25oC, the potential due to Fin unfluoridated groundwater in Foxboro, Massachusetts, was 40.0 mV more positive than the potential of tap water in Providence, Rhode Island. Providence maintains its fluoridated water at the recommended level of 1.00 ± 0.05 mg F-/L. What is the concentration of F-in mg/L in groundwater in Foxboro? (Disregard the uncertainty.)
By how many volts will the potential of an ideal Mg2 ion-selective electrode change if the electrode is transferred from 1.00 104 M MgCl2 to 1.00 103 M MgCl2?
explain primary reference electrode and Secondary reference electrode?
When a fluoride selective electrode was immersed in a solution that is 1.0 x 10-4 M in F-, the potential that developed (versus SCE) was 41.5 mV. What will be the potential that will develop if the same electrode is immersed in a solution that is 5.0 x 10-5 M in fluoride? -51 mV -47 mV -59 mV -32 mV
The following data were obtained with a cadmium-selective solid-state electrode. The ionic strength of each solution was 0.30 M, and the reference electrode was a saturated calomel electrode. Determine the concentration of the unknown cadmium ion in the sample. [Cd2+], M 1.00x10-1 8.75x10-3 1.00x10-3 3.16x10-5 3.16x10-6 Unknown E, V -0.115 -0.150 -0.175 -0.213 -0.242 -0.200
A fluoride ion-selective electrode has a selectivity coefficient KPot F2, OH2 5 0.1. What will be the change in electrode potential when 1.0 104 M F at pH 5.5 is raised to pH 10.5?
How long does it take to deposit a coating of gold 1.00 μm thick on a disk-shaped medallion 4.00 cm in diameter and 2.00 mm thick at constant current of 89 A? The density of gold is 19.3 g/cm3 and the gold is from an Au(III) solution. ____ s