Voltaic cells construction

Give the notation for a voltaic cell constructed from a hydrogen electrode (cathode) in 1.0 M HCl and a nickel electrode (anode) in 1.0 M NiS04 solution. The electrodes are connected by a salt bridge. 

An electrode is prepared by dipping a silver strip into a solution saturated with silver thiocyanate, AgSCN, and containing 0.10 M SCN. The emf of the voltaic cell constructed by connecting this electrode as the cathode to the standard hydrogen half-cell as the anode is 0.45 V. What is the solubility product of silver thiocyanate ... 

Calculate the cell potential for a voltaic cell constructed from the following half-cells Fe3+(aq)/Fe2+(aq) and Ag (aq)/Ag(s)... 

Construct voltaic cells using various combinations of metals for electrodes. 

Using the plan from your Pre-Lab, construct voltaic cells using the four metals and 1 mL of each of the solutions. Remember to minimize the use of solutions. Put the metals in the wells that contain the appropriate solution (for example, put the zinc metal in the solution with zinc nitrate). Use a different salt bridge for each voltaic cell. If you get a negative value for potential difference, switch the leads of the probe on the metals. 

Have you ever wondered how a battery works You can find out how in this chapter. In Chapter 11, you learned how oxidation-reduction reactions transfer electrons from one species to another. Batteries use oxidation-reduction reactions, but they are carefully designed so the flow of electrons takes place through a conducting wire. The first battery was made in 1796 by Alessandro Volta, and batteries are commonly called voltaic cells in his honor. There are many different ways to construct a voltaic cell, but in all cases, two different chemical species must be used. The voltage of the cell depends on which species are used. 

A voltaic cell is constructed using Al andAl+3 in one half cell andAg andAg+ in the other half-cell... 

The name galvanic cell honors Luigi Calvani (1737-1798), an Italian scientist generally credited with the discovery of electricity. These cells are sometimes called voltaic cells after Alessandro Volta (1745-1827), another Italian, who first constructed cells of this type around 1800. 

Describe the construction of simple voltaic cells from half-cells and a salt bridge, and understand the function of each component... 

A voltaic cell containing a standard Fe /Fe electrode and a standard Ga /Ga electrode is constructed, and the circuit is closed. Without consulting the table of standard reduction potentials, diagram and completely describe the cell from the following experimental observations, (i) The mass of the gallium electrode decreases, and the gallium ion concentration increases around that elec-... 

Type II Polyacetylene Cathode in Conjunction with a Polyacetylene Anode (i) neutral (CH)V cathode + n-doped (CH)Y anode. Since both neutral and reduced (CH)X have good stability in an electrolyte of 1M L1C104 in tetrahydrofuran a voltaic cell can be constructed using (CH)x as the cathode and (CH- )x as the anode. During discharge the (CH y)x gives up an electron to the (CH)X producing the net overall reaction ... 

Technology has made modern batteries smaller, safer, and more dependable than our crudely constructed copper-zinc voltaic cell. In fact, the silver cell (Figure 9.11) is sufficiently safe and nontoxic that it can be implanted in the human body as a part of a pacemaker circuit that is used to improve heart rhythm. A rather futuristic potential application of voltaic cells is noted in A Medical Perspective Turning the Human Body into a Battery on page 261. 

Now we can construct a voltaic cell consisting of this reference half-cell and another half-cell whose potential we want to determine. With E eference defined as zero, the overall Eceii allows us to find the unknown standard electrode potential. 

Writing Spontaneous Redox Reactions Appendix D can be used to write spontaneous redox reactions, which is useful for constructing voltaic cells. 

SAMPLE PROBLEM 21.6 Using the Nernst Equation to Calculate Ecell Problem In a test of a new reference electrode, a chemist constructs a voltaic cell consisting of a Zn/Zn half-cell and an H2/H half-cell under the following conditions ... 

Let s examine the operation of an electrolytic cell by constructing one from a voltaie eell. Consider the tin-copper voltaic cell in Figure 21.23A. The Sn anode... 

A voltaic cell is constructed with an Ag/Ag" half-cell and a Pb/Pb" half-cell. The silver electrode is positive. 

Analyze We are given the equation for a spontaneous reaction that takes place in a voltaic cell and a description of how the cell is constructed. We are asked to write the half-reactions occurring at the anode and at the cathode, as well as the directions of electron and ion movements and the signs assigned to the electrodes. 

In the voltaic cells we have looked at thus far, the reactive species at the anode has been different from the reactive species at the cathode. Cell emf depends on concentration, however, so a voltaic cell can be constructed using the same species in both half-cells as long as the concentrations are different. A cell based solely on the emf generated because of a difference in a concentration is called a concentration cell. 

A voltaic cell is constructed with two hydrogen electrodes. Electrode 1 has = 1.00 atm and an unknown concentration of H" (ng). Electrode 2 is a standard hydrogen electrode = 1.00 atm, [H ] = 1.00Al).At 298 K the measured cell potential is 0.211 V, and the electrical current is observed to flow from electrode 1 through the external circuit to electrode 2. Calculate [ H ] for the solution at electrode 1. What is the pH of the solution ... 

Assume that you vrant to construct a voltaic cell that uses the following half-reactions ... 

A voltaic cell similar to that shown in Figure 20.5 is constructed. One electrode half-cell consists of a silver strip placed in a... 

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