Calibration data for a bromide ion-selective electrode (ISE) was collected and [Br¯] (M) Potential (mV) recorded in the table. The potential of the ISE was measured against a saturated 0.300 -21.1 calomel electrode (SCE). All solutions were buffered at a pH of 7.56. A linear 0.0300 36.7 calibration curve can be constructed from this data as a plot of potential (in mV) vs. pBr. Determine the slope and y-intercept of such a plot of the calibration 0.00300 95.5 data given. 0.000300 154.7 0.0000300 225.7 slope = mV у-intercept mV Two unknown solutions were tested for [Br¯] using the same bromide ISE. The potential reading for unknown 1 was 19.5 mV, and the potential reading for unknown 2 was 185.2 mV. Using the calibration curve you constructed, determine the concentration of Br¯ in each unknown solution. unknown 1 [Br¯] = M unknown 2 [Br¯] = M

Calibration data for a bromide ion-selective electrode (ISE) was collected and [Br¯] (M) Potential (mV) recorded in the table. The potential of the ISE was measured against a saturated 0.300 -21.1 calomel electrode (SCE). All solutions were buffered at a pH of 7.56. A linear 0.0300 36.7 calibration curve can be constructed from this data as a plot of potential (in mV) vs. pBr. Determine the slope and y-intercept of such a plot of the calibration 0.00300 95.5 data given. 0.000300 154.7 0.0000300 225.7 slope = mV у-intercept mV Two unknown solutions were tested for [Br¯] using the same bromide ISE. The potential reading for unknown 1 was 19.5 mV, and the potential reading for unknown 2 was 185.2 mV. Using the calibration curve you constructed, determine the concentration of Br¯ in each unknown solution. unknown 1 [Br¯] = M unknown 2 [Br¯] = M

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter11: Dynamic Electrochemistry

Section: Chapter Questions

Problem 5P

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