Explain how to conduct the electrode calibration for a potentiometric measurement.
Explain how to conduct the electrode calibration for a potentiometric measurement.
Explain how the differences in the solubility products of AgI and AgCl make this experiment (potentiometric determination of mixed halides) possible. Include in your discussion a narrative of what is happening to the electrode potentials and the I-, C-, and Ag+ ions.
the quinhydrone electrode can be used for the potentiometric determination of pH. the solution to be measured is saturated with quinhydrone, an equimolar mixture of quinone and hydroquinone and the potential of the solution is measured with a platinum electrode. the half reaction has an E of 0.699. What is the pH of a solution saturated with quinhydrone if the potential of a platinum electrode in the solution measured against a saturated calomel electrode is -.205V
Electrochemical Measurement of Concentration An electrochemical cell consists of a standard hydrogen electrode and a copper metal electrode. What is the potential of this cell at 25°C if the copper electrode is placed in a solution in which [Cu2+] = 9.2×10-5 M? 1 pts Tries 0/8 The copper electrode of the above cell is placed in a solution of unknown [Cu2+]. The measured potential at 25°C is 0.160 V. What is [Cu2+] (in mol/L)? (Assume Cu2+ is reduced.) 1 pts...
Electrochemical Measurement of Concentration An electrochemical cell consists of a standard hydrogen electrode and a copper metal electrode. a) What is the potential of this cell at 25°C if the copper electrode is placed in a solution in which [Cu2+] = 7.5×10-8 M? b) The copper electrode of the above cell is placed in a solution of unknown [Cu2+]. The measured potential at 25°C is 0.109 V. What is [Cu2+] (in mol/L)? (Assume Cu2+ is reduced.) c) A calibration curve...
In complex formation potentiometric titration with EDTA solution, the working electrode is La and the reference electrode is saturated calomel. This is the table of titration 25 ml ionic solution La3+ with EDTA solution 3,95x10-3 M. Determine the concentration of La3+. Vol EDTA (mL) 0,00 0,02 0,04 0,06 0,08 0,10 131,5 129,0 124,0 113,5 103,5 101,0 100,0 99.0 0.14 0.16 0,18 0,20 98,0 98,0 97,0 96,0 95.5 95.0 0,30 0,35 0.40
Calibration data for a bromide ion‑selective electrode (ISE) was collected and recorded in the table. The potential of the ISE was measured against a saturated calomel electrode (SCE). All solutions were buffered at a pH of 7.56. A linear 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 data given. Br-M Potential (mV 0.300 -21.6 0.0300 36.7 0.00300 96.5 0.000300...
Calibration of a glass electrode gave a reading of 134.9 mV with a 0.05 m potassium hydrogen phthalate buffer standard (pH = 4.015), and a reading of -163.2 mV with a 0.01 m borax buffer standard (pH = 9.139), both measured at 30°C. What is the observed slope (mV/PH unit) of the calibration curve? slope observed = mV/PH What is the theoretical slope at 30°C? slope theoretical = mV/pH What is B, the electromotive efficiency, to three significant figures? B...
What would the ideal slope be for a calibration curve for the measurement of europium to europium III?
Calibration data for a bromide ion-selective electrode (ISE) was collected and recorded below. The potential of the ISE was measured against a saturated calomel electrode (SCE). All solutions were buffered at a pH of 7.56. A linear 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 data given [Br] (M) Potential (mV) 0.300 0.0300 0.00300 96.4 0.000300 155.1 0.0000300 224.8...
Question 4 of 4 > Potential (my -21.9 Calibration data for a bromide ion-selective electrode (ISE) was collected and recorded in the table. The potential of the ISE was measured against a saturated calomel electrode (SCE). All solutions were buffered at a pH of 7.56. A linear 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 data given. [Br"](M) 0.300...