Standard addition. A particular CO, compound electrode To potentiometer like the one in Figure 15-33 obeys the equation E = constant – [BRT(In 10/2 F] log [CO,], where R is the gas constant, T is the temperature (303.15 K), F is the Faraday constant, and ß = 0.933 (measured from a calibration curve). [CO,] represents all forms of dissolved carbon dioxide at the pH of the experiment, which was 0.1 М H- Internal 5.0. Standard additions of volume Vs containing a silver-silver standard concentration cs = 0.0190 M NaHCO, were chloride electrode made to an unknown solution whose initial volume was V = 60.0 mL. 0.1 М КС O-ring electrolyte with weak Vs (mL) E (V) Silver-silver bicarbonate buffer chloride 0.0790 electrode in KCI 0.100 0.0724 electrolyte Glass electrode membrane 0.200 0.0653 Spacer 0.300 0.0588 CO2 permeable membrane 0.800 0.0509 Prepare a graph with Equation 15-17 and find [CO,] in Figure 15-33 Co, gas-sensing Severinghaus electrode.38 The the unknown. membrane is stretched taut, and there is a thin layer of electrolyte between the membrane and the glass bulb. (Vị + Vs)10E/S = 10k/SV;cx + 10k/Scs Vs (15-17) In Equation 15-17, cx is the initial concentration of the 38. J. W. Severinghaus, "First Electrodes for Blood Po, analyte, k is a constant that is dependent on the and Pco, Determination," J. Appl. Physiol. 2004, 97, ion-selective electrode, E is the measured cell potential, 1599. and S is equal to (RT In 10)/nF. [CO,] = M
Standard addition. A particular CO, compound electrode To potentiometer like the one in Figure 15-33 obeys the equation E = constant – [BRT(In 10/2 F] log [CO,], where R is the gas constant, T is the temperature (303.15 K), F is the Faraday constant, and ß = 0.933 (measured from a calibration curve). [CO,] represents all forms of dissolved carbon dioxide at the pH of the experiment, which was 0.1 М H- Internal 5.0. Standard additions of volume Vs containing a silver-silver standard concentration cs = 0.0190 M NaHCO, were chloride electrode made to an unknown solution whose initial volume was V = 60.0 mL. 0.1 М КС O-ring electrolyte with weak Vs (mL) E (V) Silver-silver bicarbonate buffer chloride 0.0790 electrode in KCI 0.100 0.0724 electrolyte Glass electrode membrane 0.200 0.0653 Spacer 0.300 0.0588 CO2 permeable membrane 0.800 0.0509 Prepare a graph with Equation 15-17 and find [CO,] in Figure 15-33 Co, gas-sensing Severinghaus electrode.38 The the unknown. membrane is stretched taut, and there is a thin layer of electrolyte between the membrane and the glass bulb. (Vị + Vs)10E/S = 10k/SV;cx + 10k/Scs Vs (15-17) In Equation 15-17, cx is the initial concentration of the 38. J. W. Severinghaus, "First Electrodes for Blood Po, analyte, k is a constant that is dependent on the and Pco, Determination," J. Appl. Physiol. 2004, 97, ion-selective electrode, E is the measured cell potential, 1599. and S is equal to (RT In 10)/nF. [CO,] = M
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
![Standard addition. A particular CO, compound electrode
To
potentiometer
like the one in Figure 15-33 obeys the equation
E = constant – [BRT(In 10/2 F] log [CO,], where R is the
gas constant, T is the temperature (303.15 K), F is the
Faraday constant, and ß = 0.933 (measured from a
calibration curve). [CO,] represents all forms of dissolved
carbon dioxide at the pH of the experiment, which was
0.1 М H-
Internal
5.0. Standard additions of volume Vs containing a
silver-silver
standard concentration cs = 0.0190 M NaHCO, were
chloride
electrode
made to an unknown solution whose initial volume was
V = 60.0 mL.
0.1 М КС
O-ring
electrolyte
with weak
Vs (mL)
E (V)
Silver-silver
bicarbonate
buffer
chloride
0.0790
electrode in KCI
0.100
0.0724
electrolyte
Glass
electrode
membrane
0.200
0.0653
Spacer
0.300
0.0588
CO2 permeable membrane
0.800
0.0509
Prepare a graph with Equation 15-17 and find [CO,] in
Figure 15-33 Co, gas-sensing Severinghaus electrode.38 The
the unknown.
membrane is stretched taut, and there is a thin layer of electrolyte
between the membrane and the glass bulb.
(Vị + Vs)10E/S = 10k/SV;cx + 10k/Scs Vs (15-17)
In Equation 15-17, cx is the initial concentration of the
38. J. W. Severinghaus, "First Electrodes for Blood Po,
analyte, k is a constant that is dependent on the
and Pco, Determination," J. Appl. Physiol. 2004, 97,
ion-selective electrode, E is the measured cell potential,
1599.
and S is equal to (RT In 10)/nF.
[CO,] =
M](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F244676c6-c77c-4ac3-93e6-f1ee282c5586%2Faad3c3bf-b646-4164-8902-6292e5a83e37%2Fs8r428_processed.png&w=3840&q=75)
Transcribed Image Text:Standard addition. A particular CO, compound electrode
To
potentiometer
like the one in Figure 15-33 obeys the equation
E = constant – [BRT(In 10/2 F] log [CO,], where R is the
gas constant, T is the temperature (303.15 K), F is the
Faraday constant, and ß = 0.933 (measured from a
calibration curve). [CO,] represents all forms of dissolved
carbon dioxide at the pH of the experiment, which was
0.1 М H-
Internal
5.0. Standard additions of volume Vs containing a
silver-silver
standard concentration cs = 0.0190 M NaHCO, were
chloride
electrode
made to an unknown solution whose initial volume was
V = 60.0 mL.
0.1 М КС
O-ring
electrolyte
with weak
Vs (mL)
E (V)
Silver-silver
bicarbonate
buffer
chloride
0.0790
electrode in KCI
0.100
0.0724
electrolyte
Glass
electrode
membrane
0.200
0.0653
Spacer
0.300
0.0588
CO2 permeable membrane
0.800
0.0509
Prepare a graph with Equation 15-17 and find [CO,] in
Figure 15-33 Co, gas-sensing Severinghaus electrode.38 The
the unknown.
membrane is stretched taut, and there is a thin layer of electrolyte
between the membrane and the glass bulb.
(Vị + Vs)10E/S = 10k/SV;cx + 10k/Scs Vs (15-17)
In Equation 15-17, cx is the initial concentration of the
38. J. W. Severinghaus, "First Electrodes for Blood Po,
analyte, k is a constant that is dependent on the
and Pco, Determination," J. Appl. Physiol. 2004, 97,
ion-selective electrode, E is the measured cell potential,
1599.
and S is equal to (RT In 10)/nF.
[CO,] =
M
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