0
What else can I help you with?
What is the k in the rate law equation?
A rate constant
How can the rate constant be determined form the rate law?
The rate constant can be determined from the rate law by rearranging the rate equation to isolate the constant. For a reaction with a rate law of the form ( \text{Rate} = k[A]^m[B]^n ), where ( k ) is the rate constant, ( [A] ) and ( [B] ) are the concentrations of the reactants, and ( m ) and ( n ) are their respective orders, one can measure the reaction rate at known concentrations. By substituting these values into the rate law and solving for ( k ), the rate constant can be calculated. This process often involves experimental data collected under controlled conditions.
Why is it necessary to specify the temperature when giving a value for k?
The rate constant, k, varies with temperature, so the temperature at which it has been determined must be given. In general a 10 oC temperature increase will double the rate of a chemical reaction.
Which equation would be used to calculate the rate constant from inital concentrations?
To calculate the rate constant (k) from initial concentrations, you would typically use the rate law equation for the reaction, which is expressed as ( \text{Rate} = k[A]^m[B]^n ), where ( [A] ) and ( [B] ) are the initial concentrations of the reactants, and ( m ) and ( n ) are their respective reaction orders. By measuring the initial rate of the reaction and substituting the initial concentrations into the rate law, you can rearrange the equation to solve for the rate constant ( k ).
What happens when you add a catalyst to the rate constant k?
Adding a catalyst typically increases the rate constant k by providing an alternative reaction pathway with lower activation energy. This allows the reactants to more easily convert to products, resulting in a faster reaction rate.
What is an apparent rate constant?
First order rate constant k is described in V=k[EA] while second order rate constant is given as V=k[E][A]. For reactions that do not have true order, k is the apparent rate constant.
What is the k in the rate law equation?
A rate constant
How can one determine the rate constant k in a chemical reaction?
The rate constant k in a chemical reaction can be determined by conducting experiments to measure the reaction rate at different concentrations of reactants. By plotting the data and using the rate equation, the rate constant k can be calculated.
On what does the rate constant depend?
The rate constant depends on factors such as temperature, concentration of reactants, and presence of a catalyst.
What is relative rate constant?
The relative rate constant is a ratio of the rate constants of two reactions in a chemical reaction mechanism. It is used to determine the rate of reaction between different reactants in relation to each other.
On what factors is the rate constant k dependent?
The rate constant k is dependent on factors such as temperature, concentration of reactants, presence of catalysts, and the nature of the reaction mechanism.
What units must the rate constant have based on the rate law, and can you provide an example of how to calculate it?
The rate constant must have units that make the rate equation balanced. For example, if the rate law is rate kA2B, the rate constant k must have units of M-2 s-1. To calculate the rate constant, you can use experimental data and the rate law equation to solve for k.
Which has the largest rate constant k?
Dynamite exploding
What has the largest values of the rate constant k?
how does the rate law show how concentration changes after the rate of reaction
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.
What has the largest value of the constant k?
how does the rate law show how concentration changes after the rate of reaction
How do you determine the rate constant k from a graph of the reaction kinetics?
To determine the rate constant k from a graph of reaction kinetics, you can use the slope of the line in a first-order reaction or the y-intercept in a second-order reaction. The rate constant k is typically calculated by analyzing the linear relationship between concentration and time in the reaction.
