Homework Answers
1. A salt bridge is a U shaped glass structure usually filled with gelatin or agar-agar. It is used to maintain electrical neutrality in an electrochemical cell.
2 . The sign of E tells whether a reaction is spontaneous or not. If E is positive then reaction is spontaneous otherwise reaction is nonspontaneous.
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2. (1 pt) What is the role of a salt bridge in a voltaic cell? 3....
Draw the voltaic cell (labeling the anode, cathode, and salt bridge) for the reaction between Ag/Ag...
Draw the voltaic cell (labeling the anode, cathode, and salt bridge) for the reaction between Ag/Ag and Zn/Zn"7 including the half reactions for each cell and calculated cell potential. 3.
3. The following redox couple was used in the construction of a voltaic cell. (All ions...
3. The following redox couple was used in the construction of a voltaic cell. (All ions are in aqueous solution and you ned to decide which haif resetion wil e in he cahode side and wh the cathode side and which in the anode side.) For the cell: . Make a sketch of the cell labeling anode, cathode, salt bridge (using KNOs), direction of electron flow, oxidation half ell, reduction half cell, charge of the anode, charge of the cathode,...
What is the purpose of a "salt bridge" in a voltaic cell? a) It allows electrons...
What is the purpose of a "salt bridge" in a voltaic cell? a) It allows electrons to flow from the anode through the external circuit to the cathode. b) It is the electrode at which oxidation occurs. c) It is the electrode at which reduction occurs. d) It allows ions to migrate and maintain the electric neutrality in the half cells.
Question 4 0.5 pts Which of the following statements about the salt bridge in a voltaic cell is false? The ions fro...
Question 4 0.5 pts Which of the following statements about the salt bridge in a voltaic cell is false? The ions from the salt bridge participate in the half-reactions, It allows electrical contact between the two solutions in the half-cells. It prevents mixing of the electrode solutions. It maintains the electrical neutrality in each half-cell .lons flow into and out of the salt bridge. Question 5 0.5 pts Which of the following statements about voltaic cells is false? Electrons flow...
A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are...
A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge. F2(g) + 28°(aq) — 2F (aq) + 12(s) The anode reaction is: The cathode reaction is: In the external circuit, electrons migrate the I'l, electrode the FF, electrode. In the salt bridge, anions migrate the FF, compartment the l'I, compartment. A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a...
1.Define the diffusion potential. What is a salt bridge and what is it used for? b-)...
1.Define the diffusion potential. What is a salt bridge and what is it used for? b-) One of the concentration cell was given as Ni I Ni+21 II Ni+22 II Ni with salt bridge, wherein the activities a Ni2+,I = 0. 7 and a Ni2+,II = 1. T = 25°C. Calculate the EMF of the cell if the electrochemical potentials are the same. 2.How large should the ratio of the activities of the participating metal ions (which are they) be...
•A voltaic cell is assembled as follows: ??(?) + 2??(??)+ → ??(??)2+ + 2??(?) a.Write the...
•A voltaic cell is assembled as follows: ??(?) + 2??(??)+ → ??(??)2+ + 2??(?) a.Write the half-cell reactions. Determine which is reduction and oxidation. b.Determine which electrodes do the half-cell reactions take place. c.Determine the direction of electron flow in the external wire. d.Determine the direction of ion flow in the salt bridge if the salt bridge contains KNO3(aq). e.Write the shorthand cell notation for this voltaic cell. f.Calculate the potential difference of the voltaic cell.
20.1 Mastery #4 Q2 A voltaic electrochemical cell is constructed in which the following cell reaction...
20.1 Mastery #4 Q2 A voltaic electrochemical cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge. Mg(s) + 2Fe3+(aq) ---> Mg2+(aq) + 2Fe2+(aq) What is the reaction that takes place in the anode compartment? What is the reaction that takes place in the cathode compartment? In the external circuit, electrons migrate _____ (from or to) the Fe3+, Fe2+electrode _____ (from or to) the Mg electrode. In the salt bridge, anions migrate _____ (from or to) the Fe3+, Fe2+compartment _____...
A voltaic cell is made with a salt bridge of NaNO3 and Fe(NO3)2 for the anode cell and AgNO3 for the cathode cell. a. When constructing the cell, what impact odes the volume of solution in each of the...
A voltaic cell is made with a salt bridge of NaNO3 and Fe(NO3)2 for the anode cell and AgNO3 for the cathode cell. a. When constructing the cell, what impact odes the volume of solution in each of the beakers have on the cell potential? b. If you were to add deionized water to the solution that contains Ag+(aq), would this have any effect on the cell voltage? If so, Explain how the cell voltage would change and why. c....
A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connec...
A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge. Hg2+ (aq) + 21 (aq) – Hg(l) +12(5) The anode reaction is: The cathode reaction is: In the external circuit, electrons migrate - the 1"12 electrode - the Hg/Hg2+ electrode. In the salt bridge, anions migrate - the I'll compartment the Hg/Hg2+ compartment. A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are...
Draw the voltaic cell (labeling the anode, cathode, and salt bridge) for the reaction between Ag/Ag and Zn/Zn"7 including the half reactions for each cell and calculated cell potential. 3.
3. The following redox couple was used in the construction of a voltaic cell. (All ions are in aqueous solution and you ned to decide which haif resetion wil e in he cahode side and wh the cathode side and which in the anode side.) For the cell: . Make a sketch of the cell labeling anode, cathode, salt bridge (using KNOs), direction of electron flow, oxidation half ell, reduction half cell, charge of the anode, charge of the cathode,...
Question 4 0.5 pts Which of the following statements about the salt bridge in a voltaic cell is false? The ions from the salt bridge participate in the half-reactions, It allows electrical contact between the two solutions in the half-cells. It prevents mixing of the electrode solutions. It maintains the electrical neutrality in each half-cell .lons flow into and out of the salt bridge. Question 5 0.5 pts Which of the following statements about voltaic cells is false? Electrons flow...
A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge. F2(g) + 28°(aq) — 2F (aq) + 12(s) The anode reaction is: The cathode reaction is: In the external circuit, electrons migrate the I'l, electrode the FF, electrode. In the salt bridge, anions migrate the FF, compartment the l'I, compartment. A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a...
A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge. Hg2+ (aq) + 21 (aq) – Hg(l) +12(5) The anode reaction is: The cathode reaction is: In the external circuit, electrons migrate - the 1"12 electrode - the Hg/Hg2+ electrode. In the salt bridge, anions migrate - the I'll compartment the Hg/Hg2+ compartment. A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are...
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