Why it is necessary to platinize the electrodes of a conductivity cellbefore it is used for conductance measurement?

Q: Write the processes by which adsorption of electrolyte or ionic species at electrode surface take…

A: Interpretation: To write the processes by which adsorption of electrolyte or ionic species at…

Q: For a nitrate ion selective electrode, the selectivity factor for nitrite over nitrate is 0.062 and…

A: First calculate percentage of nitrite present in nitrate; 0.062×100=6.2% Now calculate percentage of…

Q: The conductance of several salts in a binary mixture of water and a dipolar aprotic solvent ethylene…

A: Given data:

Q: If rates of both reduction and oxidation half-reactions are moderated by activation polarisation,…

A: Given as Rates of both reduction and oxidation half-reactions are moderated by activation…

Q: Write are the mechanism of reference electrode for maintaining constant potential? answer at your…

A: ANSWER

Q: An ion selective electrode is utilised to determine the concentration of Ca2+ in the presence of…

A: Ion selective electrode The electrode that generates the potential in the response to the presence…

Q: The Zn electrode is the

A: In cell notation left side written are anode half cell and right side of species after salt bridge…

Q: 10. In a chemical cell with a displacement a liquid junction is required, what is the function of a…

A: ANSWER IS

Q: Significant evolution or deposition occurs in electrolysis only if the overpotential exceeds about…

A: The Tafel equation is an equation in electrochemical kinetics relating the rate of an…

Q: Cr2072- + Fe2+ Cr3+ + Fe3- quation for alkaline solution:

A: Dear student I have given answer to your question in the image format.

Q: The conductivity of a 0.100 moldm-3 KCl solution at 25oC is 1.289 Scm-1. What is the resistance and…

A: Concentration of KCl solution (C) = 0.100 mol / dm-3     Conductivity of solution (κ) = 1.289 S cm-1…

Q: The resistances of a series of aqueous NaCl solutions, formed by successive dilution of a sample,…

A: Kohlrausch's Law According to Kohlrausch's Law, an electrolyte's equivalent conductivity at infinite…

Q: The exchange current density at the electrode Pt| Fe3+| Fe2+ is 2.4 x 10-3 A cm-2, How many…

A: The number of singly charged particles transported per unit time per unit area at equilibrium is the…

Q: Question attached

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Q: The resistances of a series of aqueous NaCI solutions, formed by successive dilution of a sample,…

A: SOLUTION: Step 1: (a) The molar conductivity Ʌm, is related to the conductivity k by the relation,…

Q: When standardised with 0.01 M KCI, a conductivity cell had a resistance of 189 n at 298 K. At same…

A:

Q: Provide as many error sources in your calibration of the ion-selective electrode (ISE) as you can.

A:

Q: 5- Resistance of the 0.05 M solution placed between two Pt electrodes having surface area 10 cm' at…

A: Concentration = 0.05 M Surface area(A) = 10 cm2 Length (l) = 1.5 cm Resistance (R) = 50 ohm

Q: a) Explain how a signal (voltage) is produced by the glass electrode.b) Give the line diagram and…

A: a)A glass electrode is a kind of ion-selective electrode which is made up of doped glass membrane.…

Q: Explain the difference between alkaline and acid errors which occur by using glass electrodes

A: The pH of the solution is measured by the glass electrode. When a glass electrode is immersed into…

Q: Name the advantages of glass electrode in potentiometric measurements (please write correctly and…

A: Following are the advantages of glass electrodes in potentiometric measurements.

Q: a. Why dyes cannot be used in the place of pigments? b. What will happen if ITO or FTO is not plated…

A: a) Dyes cannot be used in the place of pigments.

Q: Write the faults of the glass electrode. (Please write it correctly and concisely.)

A: Glass electrode some disadvantages or faults.

Q: The resistance of a decinormal solution of a salt occupying a volume between Pt electrodes is 1.80…

A: Normality of solution = 0.1 N  Distance between electrode(l) = 1.80 cm  Cross section area of…

Q: The following data show the anodic current through a platinum electrode of area 2.0 cm² in contact…

A: Anodic Process: Fe2+(aq) ----> Fe3+(aq) + e- Tafel Plot: ln j vs η

Q: why is equivalent weight of KMnO4 is different in acidic, alkaline and neutral medium ?

A: Equivalent weight of potassium permanganate in acidic, in basic, and neutral medium depends on…

Q: Give 10 applications of Photoconductive cells

A: Photoconductive cells- It is a light sensitive semiconducting device and has electrical conductivity…

Q: Briefly describe or define: liquid junction formal potential electrode of the second kind

A: Liquid junction :- A boundary between two electrolyte solutions of different composition, across…

Q: Write the advantages of the glass electrode. (Please write it correctly and concisely.)

A: advantages of the glass electrode 1) Glass electrodes ware most commonly used where the chemical…

Q: b) In one conductivity cell, the resistance of a 0.1 M KCl solution is 1.5x102 Ω. The known molar…

A: Introduction :  We have to calculate cell constant . Given :  Resistance of cell = 1.5 × 102  Ω…

Q: Electrode 1 Cu Cu Cu Cu Zn Zn Zn Pb Pb Electrode 2 Mg Zn Pb Mg Sn Pb Mg Sn Mg Sn Cell potential…

A: Standard cell potential, Eocell of a cell is calculated from the standard electrode potential values…

Q: 2) Name the advantages of glass electrode in potentiometric measurements (please write correctly and…

A: Advantages of glass electrode in potentiometric measurements:

Q: Write the applications of the glass electrode. (Please write it correctly and concisely.

A: Applying concept of glass electrode.

Q: An aqueous sodium chloride solution is electrolyzed using a current of 4.42 A. How much time (min)…

A: An aqueous sodium chloride solution is electrolyzed using a current of 4.42 A. How much time (min)…

Q: The forward-bias voltage (V) required to maintain a PN diode current (I) is a function of the…

A:

Q: A conductivity cell when standardized with 0.01 M KCI was found to have a resistance (R) of 189 N at…

A: Given: Concentration of KCl solution = 0.01 M Resistance of KCl cell = 189 Ω Concentration of NH4OH…

Q: Is a quantitative separation of Zn2+ and Ag+ by electrolytic deposition feasible in principle? If so…

A: The species having a higher reduction potential will undergo reduction whereas the species having a…

Q: A comosion cell i made of Zn anode electrode (E0-0 762 V, -01 V and i10mAcm) and ahydrogen electrode…

A: To determine: The rate of corrosion of Zn electrode?

Q: 7. In an experiment on the Pt| H2| H electrode in dilute H:SO4, the following current densities were…

A:

Q: How is cell constant calculated from conductance values?

A: The calculation of Cell constant: The resistance of a conductor is directly proportional to the…

Q: The exchange current density at the electrode Pt| Fe3+| Fe2+ is 2.4 x 10-3 A cm-2, How many…

A: The number of singly charged particles transported per unit time per unit area at equilibrium is the…

Q: The boundary equivalent conductivity of the 0.1 M electrolyte with a resistance of 0.33 ohms was…

A: Given : Resistance of the cell = 0.33ohm Molar conductivity = 320Scm-2mol-1 Conductivity Ratio =…

Q: A conductivity cell was calibrated using 0.01 M KCl (κ = 1.4087x10-3 S/cm) and the measured…

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Q: The diffusion limiting current (Is) at a dropping mercury electrode for an aqueous Mg(II) solution…

A: The limiting current also known as the diffusion current at dropping Hg electrode for an aqueous Mg…

Q: 2.44 The molar conductivity of a 0.01 M weak acid (HX) at 298 K, measured in a conductivity cell…

A: The “Arrhenius theory of electrolytic dissociation” says that in aqueous solution, the electrolyte…

Q: A polarogram with a dropping murcury electrode has a diffusion current of 18 microA.  How much Zn2+…

A: Given:Diffusion current=18 microAVolume=50.00 millilitres of 0.250 mMTime=2.8 min