## The Arrhenius Equation

When discussing the reaction order, we mentioned that the rate of a first- and second-order reaction depends on the concentration of the reactant. For example, the rate for a simple first-order reaction can be shown as:   A → Products … Read more

## Activation Energy

A chemical reaction between two molecules occurs when they collide with proper orientation and sufficient kinetic energy. During the collision, the kinetic energy is used to stretch, bend, and ultimately break bonds, initiating the chemical reaction where new bonds and … Read more

## The Half-Life of a Reaction

The half-life (t1/2) of a reaction is the time required for the concentration of a reactant to drop to one-half of its initial value. The half-life depends on the order of the reaction, and it is obtained from the corresponding … Read more

## Determining Reaction Order Using Graphs

In the previous post, we talked about the integrated rate law and its use for determining the concentration of a reactant at a given time when the reaction order was provided.   Now, there are questions where the reaction order … Read more

## Units of Rate Constant k

Knowing the units of the rate constant is important as it is used often for solving problems related to the rate laws.   k Units of a Zero-Order Reaction Zero-order indicates that the rate does not depend on the concentration, … Read more

## How Are Integrated Rate Laws Obtained

We talked about the integrated rate laws in the previous post. Remember, they show the correlation between the concentration of reactants and time. There is a question that I got asked quite a few times when teaching the contacts and … Read more

## Integrated Rate Law

The integrated rate law of a chemical reaction shows how the concentrations of reactants change with time. For example, you are running a reaction and want to what the concentration of reactant A will be in 1 hour, how long … Read more

## How to Determine the Reaction Order

We mentioned in the previous post that the order of a reaction can be determined only by experiment. Most often, this experiment consists of measuring the initial rate of the reaction by changing the concentration of the reactant and monitoring … Read more

## Rate Law and Reaction Order

In the previous post, we talked about the reaction rate and saw that it is not constant and changes with the concentration of reactants. This is not true for all reactions and it’s possible that the rate may be independent … Read more

## Reaction Rate

Average Rate of a Reaction Chemical kinetics studies the rates of chemical reactions which is a measure of how fast they occur. Similarly, the rate of a chemical reaction is measured as a change in the amounts of reactants or … Read more

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