# Does the rate law have to be experimentally determined?

## Does the rate law have to be experimentally determined?

The substances that influence the rate of reaction are usually one or more of the reactants, but can occasionally include products. 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.

Can the exponents in a rate law be determined from the balanced equation?

To reiterate, the exponents x and y are not derived from the balanced chemical equation, and the rate law of a reaction must be determined experimentally. These exponents may be either integers or fractions, and the sum of these exponents is known as the overall reaction order.

How are the exponents in a rate law determined quizlet?

Experimental Determination of the Exponents: How are the exponents in the rate law determined? First, by measuring initial reaction rates for different concentrations (pressures) of the reactants. For example, for a reaction where a gas is produced, the initial reaction rate can be determined…

### How to determine exponents for a rate law?

Top Determining Exponents for a Rate Law from Initial Rates (Experimental Data) If we are given data from two or more experiments at the same temperature with different concentrations of reactants and different rates we can determine the exponents in the differential rate law for the reaction as follows:

How to determine the rate law from experimental data?

Determining the Rate Law from Experimental Data In order to experimentally determine a rate law, a series of experiments must be performed with various starting concentrations of reactants. The initial rate law is then measured for each of the reactions.

How are X and Y determined in the rate law?

You can determine x and y in the rate law by looking at experimental data and noticing how the change in concentration of a reactant is related to the reaction rate. The reaction order helps chemists know if the concentration of reactants impacts the rate. You can determine it by adding the exponents x and y.

#### How is the rate constant k and the exponent p determined?

The exponents m, n, and p are usually positive integers (although it is possible for them to be fractions or negative numbers). The rate constant k and the exponents m, n, and p must be determined experimentally by observing how the rate of a reaction changes as the concentrations of the reactants are changed.