Utilise this free Rate Constant Calculator to find the rate of the reaction, half-life and rate constant easily. It will accept the rate constant, order of the reaction, and concentration of the substance as inputs and gives the rate reaction, half-life as output in the blink of an eye.
Constant Rate Calculator: This handy online tool is designed to calculate the rate of reaction, half life or rate constant, the concentration of the substance. Here, you can find the step by step detailed process to calculate the reaction rate and half-life of the substance. Also, check the solved questions, equations of rate constant, and what is meant by constant reaction rate in the following sections.
Following are the steps to calculate the rate of reaction, the half-life of a substance effortlessly.
Reaction Rate: The rate of reaction is nothing but the speed of the reaction. It tells how many moles react per liter of substance in one second. The units are M/sec, M/min or mol/(sec * L).
Rate Constant: It is the proportionality coefficient that depends on the temperature and the type of reaction. It can be described in many different equations.
Half Life: It is the period in which one half of the substrate will undergo the chemical transformation.
The rate constant will have different formulas based on the order reaction.
In zero order reaction,
For first order reaction,
Second order reaction,
[A] is the concentration of the substance
k is the rate constant
T½ is the half life
Question: Find the reaction rate constant of a substance. If the reaction rate is 5 M/sec, concentration is 10 M and the first order reaction.
The order of reaction is first order
Reaction rate = 5 M/sec
Concentration of the substance [A] = 10 M
Rate constant k = rate/[A]
= 5/10 = 0.5 sec-1
Half life = 0.693/k
= 1.386 sec
The reaction rate constant is 0.5 1/sec and half life is 1.386 sec.
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1. What is the rate constant?
The rate constant is defined as the proportionality constant that explains the relationship between the molar concentration of the reactants ad the chemical reaction rate. It is also known as the reaction rate constant and it is dependant on the temperature.
2. How to find the rate constant?
To calculate the rate constant, you have to get the order of reaction and concentration details. For a zero-order of reaction, the reaction constant is equal to the reaction rate. For the first order of reaction, the constant rate is obtained by dividing the rate by the concentration.
3. What is the rate of reaction equation?
The reaction rate formulas for three different order of reactions is mentioned-here:
4. What are the differences between the rate of the reaction and the rate constant?
The reaction rate is expressed in terms of consumption of reactants or product formation per unit time. The rate constant is the proportionality constant in a different form. The unit of rate of reaction is mol/L cm. Rate constant unit varies based on the order of the reaction.