40. In a galvanic cell, the cathode consists of a Ag"(1.00 M)|Ag half-cell. The anode is a platinum wire, with hydrogen bub- bling over it at 1.00-atm pressure, which is immersed in a buffer solution containing benzoic acid and sodium benzo- ate. The concentration of benzoic acid (C,H;COOH) is 0.10 M, and that of benzoate ion (C,H,COO") is 0.050 M. The overall cell reaction is then Ag* (aq) + H2(8) + H;O(t) → Ag(s) + H;O* (aq) and the measured cell potential is 1.030 V. Calculate the pH in the buffer solution and determine the K, of benzoic acid.

40. In a galvanic cell, the cathode consists of a Ag"(1.00 M)|Ag half-cell. The anode is a platinum wire, with hydrogen bub- bling over it at 1.00-atm pressure, which is immersed in a buffer solution containing benzoic acid and sodium benzo- ate. The concentration of benzoic acid (C,H;COOH) is 0.10 M, and that of benzoate ion (C,H,COO") is 0.050 M. The overall cell reaction is then Ag* (aq) + H2(8) + H;O(t) → Ag(s) + H;O* (aq) and the measured cell potential is 1.030 V. Calculate the pH in the buffer solution and determine the K, of benzoic acid.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

A voltaic cell is constructed with two Zn2+ - Zn electrodes. The two half-cells have 3Zn2+4 = 1.8 M and 3Zn2+4 = 1.00 * 10-2 M, respectively. (a) Which electrode is the anode of the cell?
The voltaic cell Ca(e)]Ca** (ag) || Ni²* (1.0 M)|Ni(s) has a cell potential of 0.290 V at 25°C. What is the concentration of cadmium ion? (Eal = 0.170 V.) Concentration = M
A voltaic cell is constructed in which the anode is a Fe|Fe2+ half cell and the cathode is a H2|H+ half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: + + The cathode reaction is: + + The net cell reaction is: + + In the external circuit, electrons migrate (from or to?) the H2|H+ electrode (from or to?) the Fe|Fe2+ electrode.In the salt bridge, anions migrate (from or to?) the Fe|Fe2+ compartment (from or to?) the H2|H+ compartment.
1 2 B A galvanic cell is composed of these two half-cells, with the standard reduction potentials shown: Co2(aq) + 2e Co(s) E° -0.28 volt; Cd2+ (aq) + 2e-Cd(s) E°--0.42 volt. What is the standard free energy change in kJ for the cell reaction of this galvanic cell? Report your answer in whole number. Do not put unit in your answer. Type your answer...
A voltaic cell is constructed in which the anode is a Pb | Pb²+ half cell and the cathode is a l| 12 half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: The cathode reaction is: + The net cell reaction is: + → ↑ In the external circuit, electrons migrate In the salt bridge, anions migrate + + Enter electrons as e + the 1₂ electrode the 1₂ compartment [ the Pb | Pb²+ electrode. the Pb | Pb2+ compartment.
A voltaic cell is constructed in which the anode is a Pb|Pb2+ half cell and the cathode is a I-|I2 half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: + + The cathode reaction is: + + The net cell reaction is: + + In the external circuit, electrons migrate _(from or to?)__ the I-|I2 electrode _(from or to?)__the Pb|Pb2+ electrode.In the salt bridge, anions migrate _(from or to?)__ the Pb|Pb2+ compartment _(from or to?)__ the I-|I2 compartment.
A voltaic cell is constructed in which the anode is a Hg|Hg2+ half cell and the cathode is a F-|F2 half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: + + The cathode reaction is: + + The net cell reaction is: + + In the external circuit, electrons migrate the Hg|Hg2+ electrode the F-|F2 electrode.In the salt bridge, anions migrate the Hg|Hg2+ compartment the F-|F2 compartment.
Kindly write the sol.n
Consider the following cell: | Zn (s) | Ca2* (aq) , SO3²- (aq) || Hg²+ (aq) , F' (aq) | Pt (s) | al Indiate the Oxidizing Agent bindicate the ReducingAge Gont e Wnte he narreattions that occurs ai the cathode d) Write the half reactions that occurs at the anode e) Write the overall net cell reaction f) Calculate the cell potential g) Indicate if electricity is produced or consumed by the cell h) Indicate if the cell is galvanic or electrolytic
Enter electrons as e". A voltaic cell is constructed in which the anode is a Mn Mn2+ half cell and the cathode is a CI|Cl, half cell. The half- cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: The cathode reaction is: The net cell reaction is: In the external circuit, electrons migrate v the Mn|Mn2+ electrode | v the Cl|Cl, electrode. In the salt bridge, anions migrate v the Cl|Cl2 compartment v the Mn|Mn²+ compartment. +
The cell potential of the following cell at 25°C is 0.475 V: Zn|Zn?+ (0.20 M) || H* (test solution)|H2(1.0 atm)|Pt What is the pH of the test solution? The standard reduction potential for Zn²+ is -0.76 V. (Enter your answer to two significant figures.) pH = %3!
MnO4– + Sn ----> MnO2 + Sn2+ A) Identify the half-reaction that occurs at the cathode. B) Identify the oxidizing agent and anode. C) standard cell potential? D) What will be the potential of a cell constructed using 57.0 g MnO2, 1.57 M MnO4–, 14.8 g Pt, 12.5 g Sn and 0.87 M Sn2+ at pH 2.5?