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Rates of reaction can be expressed depending upon their order.
For example say you have a reaction between two chemicals and the initial rate for that reaction is known :-
when:-
The concentration of one of the reactants is doubled and the other reactants concentration remains the same and the overall rate of reaction does not change - reaction is zero orderwith respect to chemical which was doubled.
The concentration of one of the reactants is doubled and other reactants concentration remains the same and the overall rate of reaction doubles - reaction is first order with respect to chemical which was doubled.
The concentration of one of the reactants is doubled and other reactants concentration remains the same and the overall rate of reaction quadruples - reaction is second order with respect to chemical which was doubled.
Zero Order
rate = k
First Order
rate = k [A] (reaction is 1st order with respect to [A] and 1st order overall)
Second Order
rate = k [A][B] (reaction is first order with respect to [A] and first order with respect to[B], reaction is second order overall)
rate = k [A]2 (reaction is second order with respect to [A] and second order overall)
Orders are simply added together in order to determine the overall order of reaction :-
rate = k [A][B][C] would be third order overall and first order with respect to each of the reactants
There are other orders of reaction, for example 2 and 3 quarter orders and third order reactions, but these are a little more complex.
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.
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
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 speed at which a reaction occurs called?
The chemical term is reaction rate.
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.
