which part of a ph probe is unaffected by temperature or the presenceof hydrogen ions? 1. ISE 2. MEasurement Electrode 3. Porous Junction4. Reference Electrode

The question is asking us to identify the part of a pH probe that remains unaffected by changes in…

Answered: which part of a ph probe is unaffected…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter21: Potentiometry

Section: Chapter Questions

Problem 21.1QAP

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Galvanic cells harness spontaneous oxidationreduction reactions to produce work by producing a current. They do so by controlling the flow of electrons from the species oxidized to the species reduced. How is a galvanic cell designed? What is in the cathode compartment? The anode compartment? What purpose do electrodes serve? Which way do electrons always flow in the wire connecting the two electrodes in a galvanic cell? Why is it necessary to use a salt bridge or a porous disk in a galvanic cell? Which way do cations flow in the salt bridge? Which way do the anions flow? What is a cell potential and what is a volt?
An aqueous solution of an unknown salt of vanadium is electrolyzed by a current of 2.50 amps for 1.90 hours. The electroplating is carried out with an efficiency of 95.0%, resulting in a deposit of 2.850 g of vanadium. a How many faradays are required to deposit the vanadium? b What is the charge on the vanadium ions (based on your calculations)?
The cell potential of the following cell at 25C is 0.480 V. ZnZn2+(1M)H+(testsolution)H2(1atm)Pt What is the pH of the test solution?
21. (What exactly is meant by potentiometric methods? What are they even?)
5. A solution of 0.100 M HCI and a solution of 0.100 M NAOH 14 are prepared. A 40.0 mL sample of one of the solutions is added to a beaker and then titrated with the other solution. A 12 pH electrode is used to obtain the data that are plotted in the 10 titration curve shown. 8. pH a. Identify the solution that was initially added to the beaker and which solution was in the buret. Explain your reasoning. 6. 2 b. At the equivalence point, how many moles of titrant 0- have been added? 20.0 40.0 60.0 80.0 Volume of Titrant Added (mL) c. The same titration is to be performed again, this time using an indicator. Use the information in the table below to select the best indicator for the titration. Explain your choice. pH Range of Color Change Indicator Methyl violet 0-1.6 Methyl red 4-6 Alizarin yellow 10 - 12
How does hydronium ion concentation relate to electrode potential in potentiometry? a. As temperature increases, the pH also increases. b. Each pH unit represents a 59.1 mV change in potential. c. The increase in pH is linear relationship to the electrode potential. d. Decreased H+ concentration is directly proportional to electrode potential. e. none of these
Describe the standard hydrogen electrode by drawing the relevant figure. Why is this electrode is needed.
3.What happens to the standard cell potential of a battery when temperature increases? A.The standard electrode potential will not be affected by any change in temperature. B.The standard electrode potential will always decrease when temperature increases. C.The standard electrode potential will always increase when temperature increases. D.The standard electrode potential may increase or decrease depending on the nature of the electrodes.
Glass membrane electrodes can be used to measure H + ions in solution. But at a very small concentration of H + ions (alkaline conditions) it gives an error because it also responds to Na + ions. a) Explain the working principle of a glass membrane electrode which can be used to measure H + or pH ions! Include the cell notation on the pH meter's electrode and the equation relating the potential to the H + ions in the solution! b) Calculate the relative error of the H + ion measurement that occurs if the pH meter electrode is used to measure 1 x 10-2 M NaOH solution (assuming kH, Na = 10 ^ -10 and the activity coefficient = 1)
5. Discuss the Applications of Fuel cells?
What happens to the cell potential when the concentration of the catholyte is decreased?
Which of the following statements is incorrect? O In metallic indicator electrodes, the potential arises from the tendency of a redox reaction to occur at an electrode surface. O An electrolytic cell is a cell in which an external supply of electrical energy is used to bring about a physical or chemical change. O All statements are correct. O In membrane indicator electrodes, the potential is a kind of junction potential that develops across a membrane that separates the analyte solution from a reference solution. O A galvanic cell is a device which converts the Gibbs free energy of a physical or chemical change into electrical energy.

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which part of a ph probe is unaffected by temperature or the presence of hydrogen ions? 1. ISE 2. MEasurement Electrode 3. Porous Junction 4. Reference Electrode