(DOC) Lab report Electrochemical cells | Narynbek Gilman - zellebrss.tk

 

electrochemical cell lab report

Oct 23,  · SKU Lab Report 4 - Galvanic Cell - Free download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online for free. Galvanic Cell5/5(13). Electrochemical Cells. Laboratory #15 Henry Ko AP Chemistry Dulaney High School March 12th, Abstract: In this experiment, a standard table of reduction potentials of a series of metal ions is constructed using copper, iron, lead, magnesium, silver, and zinc. These half cells are are connected by a salt bridge and all potentials are measured with respect to the zinc electrode.5/5(13). Lab report Electrochemical cells. Narynbek Gilman. there will be created an electrochemical cell. In its turn, the electrochemical cell is divided by two groups: voltaic or galvanic cells and electrolytic cells. Galvanic cells convert a chemical energy to an electrical energy and electrolytic cells do a conversion oppositely. In this.


Electrochemical Cells | Redox | Electrochemistry


The voltage of a reaction containing two metal strips in separate aqueous solutions, with a salt bridge in between to balance charge as the reaction progressed. These values were then used to determine the half reaction voltage of the reduction half reactions, which contained the metals that were attached to the positive alligator clip of the voltmeter.

The reduction cell potentials of Cu, Zn, and Pb were calculated to be. It appears that according to the data, the experiment was successful up until this point. No appreciable error occurred in reference to Tables 1 and 2. However, when the experiment moved to the portion of the experiment measuring temperature vs, electrochemical cell lab report. In theory, as the temperature decreased, the voltage would have decreased as well.

The natural movement of the electrons is closely related to the Gibbs Free Energy of the reaction; that is, as Gibbs Free Energy becomes more negative and therefore more spontaneousthe movement of the electrons should decrease, as seen in Table 3. However, this change should be occurring at the temperature increases; in the given experiment, this relationship occurs to be flipped, with the voltage increasing and the Gibbs Free Energy becoming more spontaneous as the temperature decreases.

As is apparent in Graph 4, this set of electrochemical cell lab report gives a positive slope Temperature, the slope should be negative, because the two should be inversely related. Unfortunately, the consequences of having electrochemical cell lab report unreliable data were, in a word, catastrophic. When the change of enthalpy was compared to the change in entropy, you can see that both appear to be negative. This would mean that based on the results collected, that the reaction is only spontaneous at low temperatures.

It is known, however that the reaction should be, electrochemical cell lab report, given reliable data, spontaneous at all temperatures. This then consequently affected the Gibbs Free Energy, and led the experiment to a very dissatisfying end. It became apparent during the experiment that enormous error occurred in the portion regarding temperature and change in cell potential.

It appears that the functionality of the voltmeter was not correct, therefore giving results that were not accurate. The voltmeter may have just been designed incorrectly, leading it to malfunction, or perhaps the battery was dying during the experiment, so it was reading the voltage incorrectly, electrochemical cell lab report. Whatever the case may be, a simple way to rectify the situation would be to try the experiment again with a brand new voltmeter so that you may be certain that the battery is not worn down.

Given the use of a fully functional voltmeter, it is extremely possible that another trial of the experiment might yield more accurate results. The purpose of this experiment was to demonstrate the different relationships between cell potentials and electrochemical cell lab report various values that are calculated with the cell potential value.

The reduction potentials of Cu, Zn and Pb ions were then calculated to be. This gave a slope of Never the less, this slope was used to find a negative change in entropy value, which led to a cell which is only spontaneous at low temperatures. This error most likely occurred due to a problem with the voltmeter. The mechanism may have just been faulty from the beginning, or perhaps the battery was dying during the experiment. Either way, performing the experiment again with a new voltmeter would most likely solve the issues related to this experiment.

Regardless of the error that occurred, and the consequent inaccurate results, the relationship of cell potential to half-cell potential, Gibbs Free Energy, enthalpy and entropy electrochemical cell lab report well represented, and from that point of view, the experimental goals were met, yielding the experiment to be a success, electrochemical cell lab report. Browse Documents.

Electrochemistry Lab Experiment. Leave a reply Cancel reply Your email address will not be published. Comment Name Email Website.

 

Electrochemistry Lab Experiment

 

electrochemical cell lab report

 

Oct 23,  · SKU Lab Report 4 - Galvanic Cell - Free download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online for free. Galvanic Cell5/5(13). Lab RedOx Reactions Laboratory Goals In this laboratory, you will: electrochemical cell. Doing so forces the electrons to travel through the wire from the For this portion of the lab, you will need to create a number of half cells. The half cells will consist of each a . Electrochemical Cells. Laboratory #15 Henry Ko AP Chemistry Dulaney High School March 12th, Abstract: In this experiment, a standard table of reduction potentials of a series of metal ions is constructed using copper, iron, lead, magnesium, silver, and zinc. These half cells are are connected by a salt bridge and all potentials are measured with respect to the zinc electrode.5/5(13).