Discussion chemical Equilibria and kinetics

929 WordsDec 1, 20134 Pages
Discussion Our experiment is divided into 9 parts: A. Effect of Nature of Reactants to the reaction rate. B. Effect of Temperature to the reaction C. Effect of Concentration to the Reaction Rate D. Effect of Catalyst to the Reaction Rate E. Chromate-Dichromate Equilibrium F. Thiocyanatoiron (III) Complex Ion Equilibrium G. Weak Acid Equilibrium (Ionization of Acetic Acid) H. Weak Base Equilibrium Ionization of Ammonia I. Saturated Salt (Sodium Chloride) Equilibrium On part (A) we are to observe which reaction rate is faster, and doing the experiment. We have concluded that: “Aluminum had faster rate of reaction rate than iron because it is more active than iron based on the activity series.” TABLE B. Temperature (C) Time…show more content…
This diagram, at right, shows a graph (purple line) of chemical potential energy (vertical axis) versus a "reaction coordinate" (horizontal axis), which here represents the progress of a reaction in which one bond must break and a new bond forms. Examples of such reactions are provided by the many isomerization reactions, such as the interconversion of cis-2-butene and trans-2-butene. Let us first consider the forward reaction, A → B. Reactant molecules (A) in the system with enough energy to reach the energetic peak, the transition state(symbolized by the double dagger, ‡) can continue forward along the reaction coordinate to conversion to product B. This minimum energy required is the activation energy. For the forward reaction, this is symbolized as Ea, fwd, and is the energetic cost required to advance the bond breaking in a molecule of A to the point where formation of the new bond in B can begin to provide an energetic payback. The increase in potential energy must be provided by the kinetic energy of the molecules in the system, which varies by temperature, according to a Maxwell-Boltzmann distribution. For molecules, the kinetic energy can reside not only in their motion through space, but also in bond stretching, bending, and twisting. Kinetic energy in these forms is constantly being redistributed by

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