Chemical reactions, kinetics, dismutation reaction, iron chloride, potassium permanganate, stoichiometry, conservation of matter
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Abstract
This document provides a detailed analysis of various chemical reactions and kinetics, including the dismutation reaction, the reaction of iron chloride, and the kinetics of potassium permanganate. It is a comprehensive resource for students and researchers in the field of chemistry.
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[...] Here it is false" car on voit que l'on met 650 secondes pour les premiers 50% d'ions permanganate and 550 secondes ensuite. Similarly, we will have a quantity of material of . If one isolates of the equation we find . Thus, the limiting reagent is oxalic acid and the final yield is . On a (one could also read the time graphically on the graph of then find the correspondant) Exercise 2 : One test by the flame allows to ensure that the gas formed is of . The ions present in iron chloride are chloride ions and iron ions . [...]
[...] Thus, we are indeed in the stoichiometric conditions and . The absorbance peak is located at approximately 540 nm, which corresponds to the green color according to the table. If the chemical species absorbs in the green, its color is therefore the complementary color of green, which is fuchsia. Thus, the chemical species responsible for this absorption is the solution of potassium permanganate. If we want to follow this evolution, we will therefore have to position ourselves at the wavelength . [...]
[...] On the half-equations soit the dismutation reaction: On the reactions on the one hand who give the reaction: , thus, the yellow color gives way to the green color and we have a release of until depletion of . Then, if we do not add oxygenated water, we have the reactions which give Thus, the ferrous ions created react with oxygenated water and give yellow iron III ions. However, if no oxygenated water is added, the only way to recreate ferrous ions is by reducing the iron III ions with a reducing agent such as sulfuric acid. This is the dismutation reaction. The solution of chloride of catalyze the dismutation reaction. [...]
[...] Thus, noting and the volume and the quantity of mother solution taken, we have and as on deduced that . So we have . We start by pouring the mother solution into the 50 mL beaker. We then use a 10 mL graduated pipette to take the same volume of the mother solution and pour it into the 50 mL graduated flask. Next, using a graduated pipette, we add distilled water up to the mark. We then seal and agitate. [...]
