## What is the general rate law?

Rate laws or rate equations are mathematical expressions that describe the relationship between the rate of a chemical reaction and the concentration of its reactants. In general, a rate law (or differential rate law, as it is sometimes called) takes this form: rate=k[A]m[B]n[C]p… rate = k [ A ] m [ B ] n [ C ] p …

## What is Rate Law explain with example?

For example, the rate law [latex]Rate=k[NO]^2[O_2][/latex] describes a reaction which is second-order in nitric oxide, first-order in oxygen, and third-order overall. This is because the value of x is 2, and the value of y is 1, and 2+1=3.

## How do you find rate law?

In order to determine a rate law we need to find the values of the exponents n, m, and p, and the value of the rate constant, k. If we are given the reaction orders for a reaction, we have the values of the coefficients we need to write the rate law.

## Is rate a law?

The rate law is a mathematical relationship obtained by comparing reaction rates with reactant concentrations. The reaction order is the sum of the concentration term exponents in a rate law equation. A reaction’s rate law may be determined by the initial rates method.

## What is rate constant k?

The specific rate constant (k) is the proportionality constant relating the rate of the reaction to the concentrations of reactants. The rate law and the specific rate constant for any chemical reaction must be determined experimentally. The value of the rate constant is temperature dependent.

## What is the formula of rate constant?

The rate law for a zero-order reaction is rate = k, where k is the rate constant. In the case of a zero-order reaction, the rate constant k will have units of concentration/time, such as M/s.

## What is the unit of the rate of reaction?

Summary. For the purposes of rate equations and orders of reaction, the rate of a reaction is measured in terms of how fast the concentration of one of the reactants is falling. Its units are mol dm-3 s-1.

## What is 2nd order reaction?

Definition of second-order reaction

: a chemical reaction in which the rate of reaction is proportional to the concentration of each of two reacting molecules — compare order of a reaction.

## What is 1st order reaction?

A first-order reaction is a reaction that proceeds at a rate that depends linearly on only one reactant concentration.

## How do you find the rate law from a graph?

In order to determine the rate law for a reaction from a set of data consisting of concentration (or the values of some function of concentration) versus time, make three graphs. For a zero order reaction, as shown in the following figure, the plot of [A] versus time is a straight line with k = – slope of the line.

## Why is the rate law important?

The rate of a chemical reaction is, perhaps, its most important property because it dictates whether a reaction can occur during a lifetime. Knowing the rate law, an expression relating the rate to the concentrations of reactants, can help a chemist adjust the reaction conditions to get a more suitable rate.