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Let assume a simple synthesis chemical reaction in solution (the solute is inert for the considered phenomenon).
We can write
A + B -> C
and image to start with a concentration CA and CB of the components A and B and with no molecule of C.
At the beginning A and B combine to form C at high speed, since no C is yet present. While the reaction goes on, C start to be present in a certain concentration CC and also the inverse reaction starts to happen, that is C decomposes in A+B.
In an instant t, the rates of variation of the concentration of the three substances, that is the quantity of substance produced (or consumed if the rate is negative) in a very small time interval (let us call them RA, RB and RC) follows the so called chemical kinetics laws
RA = ki CC - kd CA CB
RB=RA
RC=kd CA CB - ki CC
where the parameters kd and ki are called direct and inverse reaction rates. Their values depends on the microscopic characteristics of the involved molecules, like collision section so on.
This is a very simple situation in which the synthesis happens directly by uniting an A molecule with a B molecule.
There are much more complicated reactions, where the reaction happens in a set of subsequent states and stoichiometric coefficients different from one are present.
For example oxidation of carbon oxide to carbonn dioxide
NO2 + CO -> NO + CO2
is a two step reaction, that happens as
1) NO2 + NO2 -> NO3 + NO
2) NO3 + CO -> NO2 + CO2
When a multiple step reaction is present, the rates can always be written, by their dependence from the concentration of the reaction elements is not linear, but depends on some power of the concentrations (that generally has no relation with the original reaction stoichiometry).
Also in this case however, the coefficients of such nonlinear dependence are called reaction rates.
What else can I help you with?
What is the zero order reaction rate law and how does it determine the rate of a chemical reaction?
The zero order reaction rate law states that the rate of a chemical reaction is independent of the concentration of the reactants. This means that the rate of the reaction remains constant over time. The rate of the reaction is determined solely by the rate constant, which is specific to each reaction. This rate law is expressed as: Rate k, where k is the rate constant.
How can you express the rate of a chemical reaction?
The rate of a chemical reaction can be expressed by measuring how quickly the reactants are consumed or how quickly the products are formed over time. This can be done by monitoring changes in concentration, pressure, or other relevant properties of the substances involved in the reaction.
How can one effectively write a rate law for a chemical reaction?
To write a rate law for a chemical reaction, one must determine the order of the reaction with respect to each reactant by conducting experiments and analyzing the rate of reaction at different concentrations. The rate law is then expressed as rate kAmBn, where k is the rate constant, A and B are the concentrations of the reactants, and m and n are the orders of the reaction with respect to each reactant.
How is the reaction rate measured in chemical reactions?
The reaction rate in chemical reactions is measured by monitoring the change in concentration of reactants or products over time. This can be done by measuring factors such as the amount of gas produced, color change, or temperature change. The rate of reaction is typically expressed as the change in concentration per unit time.
Can you use the law of mass action to express the rate ofa chemical reaction?
Yes, the law of mass action states that the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants raised to the power of their stoichiometric coefficients. This can be expressed as a rate equation showing how the rate of reaction changes with the concentrations of the reactants.
What is the zero order reaction rate law and how does it determine the rate of a chemical reaction?
The zero order reaction rate law states that the rate of a chemical reaction is independent of the concentration of the reactants. This means that the rate of the reaction remains constant over time. The rate of the reaction is determined solely by the rate constant, which is specific to each reaction. This rate law is expressed as: Rate k, where k is the rate constant.
How can you express the rate of a chemical reaction?
The rate of a chemical reaction can be expressed by measuring how quickly the reactants are consumed or how quickly the products are formed over time. This can be done by monitoring changes in concentration, pressure, or other relevant properties of the substances involved in the reaction.
How can one effectively write a rate law for a chemical reaction?
To write a rate law for a chemical reaction, one must determine the order of the reaction with respect to each reactant by conducting experiments and analyzing the rate of reaction at different concentrations. The rate law is then expressed as rate kAmBn, where k is the rate constant, A and B are the concentrations of the reactants, and m and n are the orders of the reaction with respect to each reactant.
What is the rate of chemical reaction is?
The rate of chemical reactions is how long a chemical reaction takes to finish.
Why catalyst affect the rate of chemical reaction?
They provide alternative pathway for the reaction, usually with less energy barrier
What is the speed at which a reaction occurs called?
The chemical term is reaction rate.
How is the reaction rate measured in chemical reactions?
The reaction rate in chemical reactions is measured by monitoring the change in concentration of reactants or products over time. This can be done by measuring factors such as the amount of gas produced, color change, or temperature change. The rate of reaction is typically expressed as the change in concentration per unit time.
Can you use the law of mass action to express the rate ofa chemical reaction?
Yes, the law of mass action states that the rate of a chemical reaction is directly proportional to the product of the concentrations of the reactants raised to the power of their stoichiometric coefficients. This can be expressed as a rate equation showing how the rate of reaction changes with the concentrations of the reactants.
What are the units for the rate constant (kc) in a chemical reaction?
The units for the rate constant (k) in a chemical reaction depend on the overall order of the reaction. For a first-order reaction, the units are 1/time (usually s-1). For a second-order reaction, the units are 1/(concentration time) (usually M-1 s-1).
What is the rate of disappearance formula used to calculate the speed at which a substance is consumed or transformed in a chemical reaction?
The rate of disappearance formula is used to calculate the speed at which a substance is consumed or transformed in a chemical reaction. It is typically expressed as the change in concentration of the reactant over time.
What are the units of measurement for the rate constant in a chemical reaction?
The units of measurement for the rate constant in a chemical reaction depend on the overall order of the reaction. For a first-order reaction, the units are 1/time (usually s-1). For a second-order reaction, the units are 1/(concentration x time) (usually M-1 s-1).
What is the first-order reaction formula used to determine the rate of a chemical reaction?
The first-order reaction formula used to determine the rate of a chemical reaction is: Rate kA, where Rate is the reaction rate, k is the rate constant, and A is the concentration of the reactant.
