What are the main factors that affect coordination equilibrium on the question of coordination compo

StabilityGenerally, the stability of a coordination compound mainly refers to the thermal stability and whether the complex is easily ionized out of its components (central atom and ligand) in solution. The coordination body can weakly dissociate a very small amount of central atoms (ions) and ligands in solution, for example, Cu(NH3)42+ can dissociate a small amount of Cu2+ and NH3: the dissociation equilibrium of the coordination body in solution is very similar to the ionization equilibrium of a weak electrolyte, and also has its dissociation equilibrium constant, which is called the stability constant k of the complex.

The larger the k, the more stable the complex, i.e., the less dissociative it is in the aqueous solution. The stability of the complex in solution is related to the radius of the central atom, the charge and its position in the periodic table, i.e. the ionic potential of the complex: =z r is the ionic potential z is the number of charges and r is the radius.

Transition metals have high nuclear charges, small radius, empty d orbitals and free d electrons, which are easy to accept the electron pairs of the ligand, and easy to feed d electrons back to the ligand. As a result, they all form stable complexes. Alkali metals and alkaline earth metals are just the opposite of transition metals, they have low polarizability, have an inert gas structure, have a poor ability to form complexes, and their complexes have poor stability.

The stability of the complex conforms to the soft-hard affinity theory, that is, soft-soft, hard-hard.

The main factors affecting the coordination equilibrium are: the influence of solution acidity, the influence of precipitation equilibrium, and the influence of precipitation equilibriumRedoxThe effect of equilibrium, the effect of other coordination equilibrium, etc.

The main factors are the degree of supercooling and stirring speed of the collapse before the control of volcanic volt, and the temperature of the cold agent. The freezing point was determined experimentally.

It needs to be cooled too much, and too much overcooling will cause the freezing point measurement results to be low, so it is necessary to control the degree of supercooling, and only when the contact surface of the two phases of the solid-liquid is quite large, the solid-liquid balance can be achieved.

Coordination titration.

Mainly: the structure, properties, coordination equilibrium, stability constant, titration curve, indicator selection and method of eliminating interference of EDTA.

Focus: Coordination balance. In coordination titration, in addition to the main reaction, there are various side reactions that interfere with the progress of the main reaction, and the reaction conditions have a great influence on the coordination equilibrium.

In the process of the experiment, the method of sudden stirring and changing the stirring speed are adopted to achieve the purpose of controlling the degree of supercooling; The temperature of the cold agent, the temperature of the cold agent is too high or too low, which is not conducive to the completion of the experiment.

complexes. The stability constant can be used to compare the stability of complexes, to determine the direction and limit of the reaction, to calculate the concentration of ions in the ion-binding solution, and to determine the poorly soluble electrolyte.

generation and dissolution, etc.

Coordination equilibrium is one of the chemical equilibriums, and if the equilibrium conditions are changed, the equilibrium will move.

Coordination equilibrium is one of the chemical equilibriums, and if the equilibrium conditions are changed, the equilibrium will move. The factors affecting the movement of coordination equilibrium are: the influence of solution acidity, the influence of precipitation equilibrium, the influence of redox equilibrium, and the influence of other coordination equilibrium.

The equilibrium constant of the ligand ion is expressed in kf, which denotes the stability constant. The formation of ligands is carried out in stages, so there are k1, k2 ......The step-by-step stability constants of the ligand ions are gradually multiplied to obtain the cumulative stability constants of the ligands.

The stability constant of the complex can be used to compare the stability tolerance of the complex, determine the direction and limit of the reaction, calculate the concentration of the ions in the ligand solution, and judge the formation and dissolution of insoluble electrolyte.

Chemical equilibrium refers to the state in which the positive and reverse reaction rates of the chemical reaction are equal and the concentrations of reactants and products no longer change in the reversible reaction under certain macroscopic conditions. It can be judged by δRGM= 0, A is the chemical potential of species A in the reaction.

According to Le Chatre's principle, if a system that has reached equilibrium is changed, the system will change accordingly to counteract the change. Chemical equilibrium is a dynamic equilibrium.

Generally, the change of the rate of forward reaction and the rate of reverse reaction in a reversible reaction indicates the process of establishing chemical equilibrium. The essence of chemical equilibrium: the rate of positive reaction is equal to the rate of reverse reaction.

Coordination equilibrium refers to the phenomenon that in a chemical reaction, the number of ligands in the reactant is equal to that in the reaction product, and they are coordinated in the same way. In coordination chemistry, a ligand refers to a molecule or ion that is capable of forming a complex with a central metal ion through a coordination bond. Coordination equilibrium refers to the fact that in a coordination reaction, the number and coordination mode of ligands remain unchanged, and the number of ligands and coordination mode between reactants and products are equal.

In coordination equilibrium, changes in the number of ligands and coordination mode affect the equilibrium slider constant of the reaction. For example, for a coordination reaction:

m(a)(b)(c)] x → m(a)(b)(c)(x)]

where M denotes the central metal ion and A, B, C, and X denote the ligand. During the reaction, the number and coordination mode of ligands a, b, c, and x must remain constant in order to achieve coordination equilibrium. If the number of ligands and coordination patterns in the adapter are different from those of the product, the reaction will be incomplete or a side reaction will be generated, which will affect the equilibrium constant of the reaction.

Coordination equilibrium is of great significance in coordination chemistry, and it can be used to ** the equilibrium constant of the reaction and the tendency of the reaction. In practical applications, coordination equilibrium can be used to design novel complexes, optimize reaction conditions, control reaction rates, etc. Therefore, it is of great significance for the research and application of coordination chemistry to understand the definition and principle of coordination equilibrium.

Summary. Hello, coordination equilibrium is one of the chemical equilibrium, change the equilibrium conditions, the equilibrium will move, coordination equilibrium is one of the chemical equilibrium, change the equilibrium conditions, the equilibrium will move. The factors that affect the movement of coordination equilibrium are:

The influence of solution acidity, the effect of precipitation equilibrium, the effect of redox equilibrium, the influence of other coordination equilibrium, etc.

Hello, coordination equilibrium is one of the chemical equilibrium, change the equilibrium bar, the equilibrium will move, coordination equilibrium is one of the chemical equilibrium, change the equilibrium conditions, the equilibrium will move. The factors influencing the movement of coordination equilibrium include the influence of acidity of Qingchun solution, the influence of precipitation equilibrium, the influence of redox equilibrium, and the influence of other coordination equilibrium.

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In coordination titration, the smaller the acid effect coefficient of the complex, the more stable the complex is.

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Not true. According to the formula of the conditional stability constant, when the acid effect coefficient increases, the actual stability of the complex should be smaller, and the more unstable the coordination compound is.

The main factors affecting the equilibrium of orange are metal ions, ligands, reaction conditions and chemical reaction mechanisms, and their respective effects are as follows

1. Metal ions: Different metal ions have different chemical properties and affinities, and for the same ligand, the mating equilibrium of different metal ions will be different.

2. Ligands: Different ligands have differences in spatial structure, charge properties and coordination methods, which will affect the selection of metal ions and the process of tremor reaction.

3. Reaction conditions: Reaction conditions include temperature, solvent type, solvent pH value and other factors. Under different reaction conditions, the balance between reactants and products will be altered, thus affecting the coordination equilibrium.

4. Chemical reaction mechanism: for ligand substitution reaction, the complex is produced by substitution reaction, and for the coordination addition reaction, the complex is formed through the addition reaction.