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Electrochemistry: the Galvanic Cell

In: Science

Submitted By DasyaDion
Words 1526
Pages 7
Electrochemistry review: The Galvanic Cell
Dion, D.A.,Franco, A.N., Jose, C.K., Jugno, C.A., Josol, S.G.
Group 4-2B-Biochemistry, Department of Biochemistry, Faculty of Pharmacy, University of Sto. Tomas

Abstract:

In this experiment, we used dry cell battery. The two main objectives of the experiment are to (1) relate and apply the concepts of electrochemistry to actual experiments, (2) understand the processes and elements of an electrochemical cell and (3) determine the spontaneity of reduction-oxidation (redox) reactions based on standard reduction potential. Different half-cells were prepared and connected to copper, which served as the reference electrode, to set up a voltaic cell. The volt-meter readings of the set-ups were then used to calculate for the standard reduction potentials of the variable half-cells. The results obtained from the experiment indicated the spontaneity of the redox reactions investigated, showing that the least spontaneous system is that connected to another copper half- while the most spontaneous system is that connected to the Zinc half-cell.

Introduction:

Electrochemistry is the study of the relationships between chemical reactions and electricity. The functionality of every portable electronic device you own, whether it be your laptop, Ipod, or cell phone, is made possible by electrochemical reactions. Fundamental oxidation/reduction reactions occur inside the batteries of these devices. Chemists and engineers all over the world are searching for ways to improve the technology by developing materials, which will make the batteries for these devices cheaper, more lightweight, and longer lasting.
Electrochemical reactions can be spontaneous or non-spontaneous. We will build on the principles we learned from the thermodynamics unit to determine if an electrochemical process is spontaneous. If it is not, we will learn how to

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