The classical dissociation constant of propionic acid, C2H5CO2H, is 1.34 x10-5 moldm-3 at 250C and the limiting molar conductivities at zero concentration of hydrogen and propionate ions are 349.8 and 35.8 ohm-1 cm2 mol-1 respectively. Calculation of the resistivity of 0.100 M solution of propionic acid.

The classical dissociation constant of propionic acid, C2H5CO2H, is 1.34 x10-5 moldm-3 at 250C and the limiting molar conductivities at zero concentration of hydrogen and propionate ions are 349.8 and 35.8 ohm-1 cm2 mol-1 respectively. Calculation of the resistivity of 0.100 M solution of propionic acid.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter21: Potentiometry

Section: Chapter Questions

Problem 21.11QAP

See similar textbooks

Similar questions

The molar conductivity of 0.020 M HCOOH(aq) is 3.83 mS m2 mol-1. What is the value of pKa for formic acid?
The resistance of 0.01 M NaCl solution at 25° C is 200 Ω. The cell constant of the conductivity cell used is unity. Calculate the molar conductivity of the solution.
Calculate the ionic strength of a solution that is 0.040 mol kg−1 in K3[Fe(CN)6](aq), 0.030 mol kg−1 in KCl(aq), and 0.050 mol kg−1 in NaBr(aq).
The resistance of 0.01 M NaCl solution at 25 °C is 200 Ω. The cell constant of conductivity cell is unity. Calculate the molar conductance.
The exchange-current density for a Pt|Fe3+,Fe2+ electrode is 2.5 mA cm−2. The standard potential of the electrode is +0.77 V. Derive an expression for the current flowing through an electrode of surface area 1.0 cm2 as a function of the potential applied to the electrode; assume standard conditions.
The conductivity of a 0.0312 M solution of a weak base is 1.53 x 104 Scm'. If the sum of the limiting ionic conductances for BH* and OH-' is 237.0 Scm²mol·' what is the value of the base constant K6? 4.5 x 10s mol.dm (i) 2.3 x 103 mol.dm (iii) 2.89 x 10 mol.dm3 (ii) 1.37 x 10-5 mol.dm3 (iv) (v) 4.78 x 103 mol.dm3
The exchange current density at the electrode Pt| Fe3+| Fe2+ is 2.4 x 10-3 A cm-2, How many electrons are transported through the double layer per second in the cell (area of 1 cm2 each)? Estimate the number of times per second that a single atom on the surface takes part in an electron transfer event, assuming that the atom occupies 280 pm2 of the surface of the electrode
A conductivity cell filled with a 0.01 M KCl solution was found to have a resistance of 189 ohms at 25oC. When filled with 0.01 M HCl solution, the cell gave a resistance of 64.8 ohms at the same temperature. At 25oC, the conductivity of 0.01 M KCl solution was 1.4088 x 10-3 S cm-1. Calculate (a) the cell constant and (b) the conductivity of the HCl solution. answer is [0.266; 4.105 x 10-3] please explain. thank you!
116.In a conductivity cell of a cell constant 0.003 cm³¹ concentration of 0.01 M solution of acetic acid, the resistance against ionic mobility is 20 ohm at 25 °C. the degree of dissociation of the acid is (where the molar conductance at infinite dilution = 390 x 104 2¹¹ m² mol¹ at 25° C) a) 0.015 b) 0.027 c) 0.038 d) 0.047
A typical exchange-current density, that for H+ discharge at platinum, is 0.79 mA cm−2 at 25 °C. Use the Butler–Volmer equation to calculate the current density at an electrode when its overpotential is (a) 10 mV, (b) 100 mV, (c) −5.0 V. Take α = 0.5.
The resistance of a 0.008 mol dm-³ solution of NaCl (aq) at 300 K was found to be 2.75 x 10³ . In a separate experiment, using the same conductivity cell, the resistance for a 0.1 mol dm-³ KCI aqueous solution was determined as 125.6 Q. Given that the conductivity of 0.1 mol dm-³ KCl aqueous solution at 300 K is 0.01302 S cm-1, calculate the molar conductivity of the NaCl aqueous solution.
6D.4 The potential of the cell Pt(s)|H,(g,p®)[HCI(aq,b)|Hg,Cl,(s)|Hg(1) has been measured with high precision with the following results at 25°C: b/(mmolkg") 1.6077 5.0403 3.0769 7.6938 10.9474 E/V 0.600 80 0.568 25 0.543 66 0.522 67 0.505 32 Determine the standard cell potential and the mean activity coefficient of HCI at these molalities. (Make a least-squares fit of the data to the best straight line.)