# What are the units for rate law?

## What are the units for rate law?

A The rate law contains only one concentration term raised to the first power. Hence the rate constant must have units of reciprocal seconds (s−1) to have units of moles per liter per second for the reaction rate: M·s−1 = M/s.

## What are the units of k in a rate reaction?

The units of the rate constant, k, depend on the overall reaction order. The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/(M·s).

How do you calculate rate of reaction units?

To find the units of a rate constant for a particular rate law, simply divide the units of rate by the units of molarity in the concentration term of the rate law. 2NO(g) + 2H2(g) → N2(g) + 2H2O(g) From the following data, determine the rate law and rate constant.

### What are the units for nth order reaction?

For nth order reaction, the units of rate constant = (molL−1)1−n. s−1.

### How do you find the rate law for a reaction?

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.

What are the units of rate?

A unit rate is a rate with 1 in the denominator. If you have a rate, such as price per some number of items, and the quantity in the denominator is not 1, you can calculate unit rate or price per unit by completing the division operation: numerator divided by denominator.

#### What is rate of reaction unit?

Reaction rates are usually expressed as the concentration of reactant consumed or the concentration of product formed per unit time. The units are thus moles per liter per unit time, written as M/s, M/min, or M/h..

#### What are the units of rate constants for first order reaction?

Because the units of the reaction rate are always moles per liter per second, the units of a first-order rate constant are reciprocal seconds (s−1).

What is rate law and how is it expressed?

Rate law is the expression in which reaction rate is given in terms of molar concentration of reactants with each term raised to some power, which may or may not be same as the stoichiometric coefficient of the reacting species in a balanced chemical equation.

## Why are the reaction orders in the rate law the same?

In some of our examples, the reaction orders in the rate law happen to be the same as the coefficients in the chemical equation for the reaction. This is merely a coincidence and very often not the case.

## What are the units for the rate of a reaction?

The units for the rate of a reaction are mol/L/s. The units for k are whatever is needed so that substituting into the rate law expression affords the appropriate units for the rate. In this example, the concentration units are mol 3 /L 3. The units for k should be mol −2 L 2 /s so that the rate is in terms of mol/L/s.

What are the units of K for a zero order reaction?

The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/ (M·s). Created by Yuki Jung. Google Classroom Facebook Twitter

### Which is the rate law for the reaction Aa + Bb → C?

For the general reaction aA+bB → C aA + bB → C with no intermediate steps in its reaction mechanism, meaning that it is an elementary reaction, the rate law is given by: In this equation, [A] and [B] express the concentrations of A and B, respectively, in units of moles per liter.

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