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
Which of the following is true about pH probe? a. A pH probe consists of a metallic indicator. b. A pH probe will always have an SCE reference electrode. c. A pH probe is specific for measuring proton concentrations. d. A pH probe is an ion selective electrode that consists of a concentration cell.
Which statement is NOT correct? pH meter should always be standardized before using to make sure that your readings are accurate and repeatable. The electrode tips should never touch the bottom or sides of a beaker. When finished using the pH meter, rinse the electrode and place it in the pH 7 buffer solution on standby. One buffer solution is enough to standardize a pH meter before using.
Data Report Sheet: The Alkaline Earths and the Halogens A: Oxidizing Power of the Halogens. Color of Hexane Layer in Standards: Iodine Bromine Chlorine Reaction of the Halides and Halogen Ions State the initial and final color of the hexane layer and whether a reaction occurred Br -I NR NR NR NR Br, R NR NR Rank the halogens in order of decreasing oxidizing strength. B: Solubility of Salts of the Alkaline Earth Elements M H,SO, M Na,CO, .025 M 0.5M KIO, (NH,),C,O, Acetic Acid (FON) NP NP NP NP NP Use your observations on solubility to arrange the Alkaline earth elements in the order in which they appear in the periodic table (top to bottom)
What mass of rhodium (Rh) metal will be deposited from a solution of Rh3+ ions by running electrical current through the solution at 0.500 A for 120.0 minutes?
1. In an electrolysis cell similar to the one employed in this experiment, a student observed that his unknown metal anode lost 0.233 g while a total volume of 94.50 mL of H2 was being produced. The temperature in the laboratory was 25 °C, and the barometric pressure was 740 mm Hg. At 25 °C, the vapor pressure of water is 23.8 mm Hg. To find the equivalent mass of his metal, the student filled in the blanks below: P hydrogen gas =P bar - VP water mm Hg = atm %3D %3D V hydrogen gas mL = L T = K n hydrogen gas moles
C. Calculate the cell potential for the overall reaction. D. Calculate the Gibbs free energy for the overall reaction. E. Write the standard cell notation for the overall reaction.
1. A concentration cell is constructed using two metal (M) electrodes with M 2+ concentrations of 0.10 M and 1.00 × 10 –5 M in the two half-cells. Determine the reduction potential of M 2+ given that the potential of the cell at 25°C is 0.118 V.a. 0 Vb. +0.118 Vc. –0.118 Vd. Cannot be determined with the information given.e. None of the above.

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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