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# What is the experimentally determined rate law?

## What is the experimentally determined rate law?

The rate law is experimentally determined to be: rate = k[NO2]2. Therefore, we would say that the overall reaction order for this reaction is second-order (the sum of all exponents in the rate law is 2), but zero-order for [CO] and second-order for [NO2].

### Are rate laws always determined experimentally?

Rate laws are determined experimentally and cannot be predicted by reaction stoichiometry. The order of reaction describes how much a change in the amount of each substance affects the overall rate, and the overall order of a reaction is the sum of the orders for each substance present in the reaction.

#### How do you write the rate law?

A rate law shows how the rate of a chemical reaction depends on reactant concentration. For a reaction such as aA → products, the rate law generally has the form rate = k[A]ⁿ, where k is a proportionality constant called the rate constant and n is the order of the reaction with respect to A.

Is rate law theoretical or experimental?

experimentally
The rate law is experimentally determined and can be used to predict the relationship between the rate of a reaction and the concentrations of reactants.

How do you determine experimental rate?

To determine the rate law from a table, you must mathematically calculate how differences in molar concentrations of reactants affect the reaction rate to figure out the order of each reactant. Then, plug in values of the reaction rate and reactant concentrations to find the specific rate constant.

## Why is rate law experimentally necessary?

The order of reaction with respect to each of the reactants, sometimes called to partial order is not equal to the stoichiometric coefficients of the reaction. They are instead dependent on how the reaction proceeds, this is why it must be determined experimentally.

### What are the two types of rate laws?

Rate laws can be expressed either as a differential rate law, describing the change in reactant or product concentrations as a function of time, or as an integrated rate law, describing the actual concentrations of reactants or products as a function of time.

#### How do you write a rate law table?

From a Table. To determine the rate law from a table, you must mathematically calculate how differences in molar concentrations of reactants affect the reaction rate to figure out the order of each reactant. Then, plug in values of the reaction rate and reactant concentrations to find the specific rate constant.

What is meant by rate law?

The rate law (also known as the rate equation) for a chemical reaction is an expression that provides a relationship between the rate of the reaction and the concentrations of the reactants participating in it.

How do you find the initial rate of reaction experimentally?

The initial rate is equal to the negative of the slope of the curve of reactant concentration versus time at t = 0….The rate of a reaction is expressed three ways:

1. The average rate of reaction.
2. The instantaneous rate of reaction.
3. The initial rate of reaction.