What is the purpose of using a reference electrode when using a pH meter to measure...
What is the purpose of using a reference electrode when using a pH meter to measure pH?
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What is the purpose of using a reference electrode when using a
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1A. A voltage of 2.35 V was measured using a Ag/AgCl reference electrode with saturated KCl....
1A. A voltage of 2.35 V was measured using a Ag/AgCl reference electrode with saturated KCl. What would this potential be if it were measured using a standard hydrogen electrode? 1B. What would the potential be if it were measured using a saturated calomel electrode? 2. At 25o C for an "ideal" pH electrode, what is the change in voltage between a pH 2.00 solution and a pH 7.00 solution? Place your answer in units of mV.
[B] Label the components of the combination pH electrode with a to f (9 points) a. 0.1 M HCl saturated with AgCI b....
[B] Label the components of the combination pH electrode with a to f (9 points) a. 0.1 M HCl saturated with AgCI b. pH-sensing membrane c. Ag/AgCl wire for outer reference electrode d. Ag/AgCl wire for inner reference electrode e. porous plug (salt bridge) f. saturated KCl and AgCl solution g. air inlet h. AgCl and KCl precipitate (-) to pH meter
If a platinum indicator electrode is used to measure [Cu^22^++] (standard reduction potential of Cu^22^++ is 0.337 V), and [Cu^22^++] = 0.0053 M, what is the cell potential (V) if the reference electr...
If a platinum indicator electrode is used to measure [Cu^22^++]
(standard reduction potential of Cu^22^++ is 0.337 V), and
[Cu^22^++] = 0.0053 M, what is the cell potential (V) if the
reference electrode is SCE and the measurement is taken at 298
K?
Indicator Electrode--Quantification (Homework) Homework Unanswered If a platinum indicator electrode is used to measure [Cu2+] (standard reduction potential of Cu +is 0.337 V), and [Cu2+ o.0053 M, what is the cell potential (V) if the reference electrode...
thank you in advance for the help 1. A pH glass electrode has a potential of...
thank you in advance for the help
1. A pH glass electrode has a potential of 0.395 V vs the SCE reference electrode when in a pH 7.00 buffer. Calculate the pH of a solution if a potential of 0.209 V was obtained. 2. A calibration curve was obtained using a fluoride ion selective electrode. Find the concentration of F in an unknown solution if the cell potential of the unknown solution is 0.050 V. Hint: Make a graph in...
A pH electrode is attached to a voltmeter that reads 0.253V when the electrode is immersed...
A pH electrode is attached to a voltmeter that reads 0.253V when the electrode is immersed in a buffer solution with a pH of 3.25 at 25 degree C. After the pH electrode is moved to an unknown buffer solution at 25 degree C, the reading of the voltmeter is lowered by 43%. From the Nernst potential equation, come up with an equation relating the measured voltage (delta psi = psi_sensor - psi_solution) to the pH of the solution. Calculate...
An uncalibrated pH electrode produces a voltage of 0.184 V for a solution of pH 5.89...
An uncalibrated pH electrode produces a voltage of 0.184 V for a solution of pH 5.89 at 25 degrees Celcius. If the same electrode is used under the same conditions to measure a solution of unknown pH and 0.376 V is measured, what is the pH of the second solution?
(a) When the difference in pH across the membrane of a glass electrode at 25 °C...
(a) When the difference in pH across the membrane of a glass electrode at 25 °C is 4.63 pH units, how much voltage is generated by the pH gradient? (b) What would be the voltage for the same pH difference at 37 °C? (c) The pH electrode has a selectivity coefficient k for Na+ of 10^-8 . What is the measured the pH value when the solution pH is at 9.0 with a Na+ concentration of 0.1 M?
QUESTION 6 is the For a three-electrode cell the working electrode is the electrode at which the reaction of interest...
QUESTION 6 is the For a three-electrode cell the working electrode is the electrode at which the reaction of interest occurs. The __ is used to measure the potential of the working electrode and the current-supporting partner of the working electrode. A. auxiliary electrode; reference electrode e reference electrode; auxiliary electrode C. reference electrode; polarizable electrode D.cathode; anode potential electrode; reference electrode QUESTION 7 Which statement describes the faradaic current? A. It is the current we do not wish to...
This is from a Study of Buffer Solutions and pH of Salt Solutions Lab. I calculated...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
which gives a better measure of the ph: universal ph paper or a ph meter? Post-Lab...
which gives a better measure of the ph: universal ph
paper or a ph meter?
Post-Lab Questions 1. Which pe o ple and proper 2. Gundulille battert data t opport your 3.Whach of your de cord was the desti n g changes 4. You are burde wp of u sodium barbana Na W s for show how t a H. und he whHO from the 5. Cele the expected pH v al the best carbon 6.12 n e d475 perimet...
[B] Label the components of the combination pH electrode with a to f (9 points) a. 0.1 M HCl saturated with AgCI b. pH-sensing membrane c. Ag/AgCl wire for outer reference electrode d. Ag/AgCl wire for inner reference electrode e. porous plug (salt bridge) f. saturated KCl and AgCl solution g. air inlet h. AgCl and KCl precipitate (-) to pH meter
If a platinum indicator electrode is used to measure [Cu^22^++]
(standard reduction potential of Cu^22^++ is 0.337 V), and
[Cu^22^++] = 0.0053 M, what is the cell potential (V) if the
reference electrode is SCE and the measurement is taken at 298
K?
Indicator Electrode--Quantification (Homework) Homework Unanswered If a platinum indicator electrode is used to measure [Cu2+] (standard reduction potential of Cu +is 0.337 V), and [Cu2+ o.0053 M, what is the cell potential (V) if the reference electrode...
thank you in advance for the help
1. A pH glass electrode has a potential of 0.395 V vs the SCE reference electrode when in a pH 7.00 buffer. Calculate the pH of a solution if a potential of 0.209 V was obtained. 2. A calibration curve was obtained using a fluoride ion selective electrode. Find the concentration of F in an unknown solution if the cell potential of the unknown solution is 0.050 V. Hint: Make a graph in...
A pH electrode is attached to a voltmeter that reads 0.253V when the electrode is immersed in a buffer solution with a pH of 3.25 at 25 degree C. After the pH electrode is moved to an unknown buffer solution at 25 degree C, the reading of the voltmeter is lowered by 43%. From the Nernst potential equation, come up with an equation relating the measured voltage (delta psi = psi_sensor - psi_solution) to the pH of the solution. Calculate...
QUESTION 6 is the For a three-electrode cell the working electrode is the electrode at which the reaction of interest occurs. The __ is used to measure the potential of the working electrode and the current-supporting partner of the working electrode. A. auxiliary electrode; reference electrode e reference electrode; auxiliary electrode C. reference electrode; polarizable electrode D.cathode; anode potential electrode; reference electrode QUESTION 7 Which statement describes the faradaic current? A. It is the current we do not wish to...
This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
which gives a better measure of the ph: universal ph
paper or a ph meter?
Post-Lab Questions 1. Which pe o ple and proper 2. Gundulille battert data t opport your 3.Whach of your de cord was the desti n g changes 4. You are burde wp of u sodium barbana Na W s for show how t a H. und he whHO from the 5. Cele the expected pH v al the best carbon 6.12 n e d475 perimet...
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