How to write the summary of the experimental report on the reaction between the sheet of copper and iron chloride-iron?

Answer 1

The following is a summary of an experimental report on the reaction between a piece of copper and iron chloride:

* * 1. Purpose of the experiment **

The phenomenon, products and related reaction principles of the reaction between the sheet of metal and the solution of iron chloride-iron were investigated.

* * 2. Experiment Principle **

Compared to iron, the reaction could reduce the iron ions in the iron chloride-like compound. The reaction equation is: 2FeCl2 + Mn = 2FeCl2 + ZnCl2. There may be other side reactions in the reaction process, such as the change in the solution's pH.

* * 3. Experimental instruments and reagents **

1. * * Instrument **
- Reaction vessels (such as test tubes, flasks, etc.), measuring instruments (such as a pH-sensor, which may be used to measure the change in the ph of the solution before and after the reaction), temperature sensors (used to detect the temperature change during the reaction), and pressure sensors (if there is a situation related to gas production).
2. * * Reagents **
- Ferric acid solution, and a piece of tin.

* * 4. Experimental Steps **

1. Put an appropriate amount of iron chloride-like solution into the reaction vessel, and measure its initial state, such as the color of the solution, the pH-value, etc.
2. Add a piece of tin to the iron chloride-like solution, start the reaction timer, and observe the reaction process, including the color change of the solution, whether there are bubbles, whether there are precipitations, and so on.
3. During the reaction, use a temperature sensor and a pressure sensor (if there is one) to record the changes in temperature and pressure during the reaction.
4. After the reaction, the solution after the reaction was analyzed. For example, take the upper clear solution and add acidic potassium Permanganate solution to check whether there was Fe2 formed. You can also add enough soda to dissolve excessive powder in the solution after the reaction. After filtering, use a magnet to attract the filter residue to verify whether there was elemental iron formed. The ph value of the solution after the reaction was measured, etc.

* * 5. Experimental Phenomenon **

1. The color of the solution changed.
- After the reaction began, the color of the solution gradually changed from yellow (the color of the FeCl3 solution) to light green, indicating that the Fe3 in the solution was reduced to Fe2.
2. temperature variation
- During the reaction, the temperature of the solution rose rapidly, indicating that the reaction was an exothermic reaction.
3. Change in pressure (if relevant)
- If you use a pressure sensor, you may find a slight increase in pressure, which may be related to the reaction producing a small amount of gas (such as hydrogen, which needs further verification) or the change in pressure caused by the increase in temperature.
4. precipitation phenomenon
- During the reaction process, reddish-brown floccule precipitations may be produced at the bottom of the bottle. This may be due to the change in the solution's pH. During the reaction process, the decomposition of Fe3 into Fe3 (O2) precipitations.

* * 6. Experiment conclusion **

1. reaction product
- Through the analysis of the solution after the reaction, such as the fading of the acidic Permanganate solution, it was confirmed that the reaction formed Fe2, and the reaction equation 2FeCl2 + Mn = 2FeCl2 + ZnCl2 was established.
2. reaction type
- The reaction was a reduction reaction. The reaction used the reducing agent, which was the reduction of the iron ions in the FeCl3.
3. Other relevant conclusions
- The increase in temperature during the reaction indicated that the reaction was heat release; the formation of precipitations in the solution was related to the change in the reaction process and the decomposition of iron ions; the change in pressure (if any) required further analysis of gas production (such as the amount of hydrogen produced) to draw a definite conclusion.

* * 7. Analysis of the errors **

1. measuring error
- When measuring data such as the solution's pH-value, temperature, and pressure, the accuracy of the instrument itself might bring some errors. For example, the accuracy limitations of a pH-sensor may cause the measured pH-value to deviate from the actual value.
2. Side Effects
- There might be some side reactions that had not been considered that would affect the results of the experiment. For example, the impurities in the solution may participate in the reaction, or the intermediate products formed during the reaction may further react, affecting the judgment of the main reaction products and the reaction process.
3. operation error
- When adding a piece of metal, if the surface of the piece of metal was not cleaned, it may affect the starting time and reaction rate of the reaction. When taking samples for subsequent analysis, improper operation may introduce impurities or cause sample loss, which may affect the accuracy of the analysis results.
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