# What is K in law of mass action?

## What is K in law of mass action?

A system not at equilibrium tends to become at equilibrium, and the changes will cause changes in Q so that its value approaches the equilibrium constant, K: Q→Keq. The mass action law gives us a general method to write the expression for the equilibrium constant of any reaction.

What is law of mass action and equilibrium constant?

The Law of Mass Action describes how the velocity of a reaction depends on the molecular concentrations of the reactants and states that when a chemical reaction reaches equilibrium, the concentrations of the chemicals involved bear a constant relation to each other, which is described by an equilibrium constant.

What is equilibrium constant in chemistry?

: a number that expresses the relationship between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.

### What does equilibrium constant K 1 indicates?

If the equilibrium constant is 1 or nearly 1, it indicates that the molarities of the reactants and products are about the same. The equilibrium constant expression is an equation that we can use to solve for K or for the concentration of a reactant or product.

What is active mass formula?

Active Mass = w /mV(l) Calculate the active mass or molar concentration ? Ans. w of H2 =4 gm.

What is equilibrium constant example?

What is Equilibrium Constant? For example, the equilibrium constant of concentration (denoted by Kc) of a chemical reaction at equilibrium can be defined as the ratio of the concentration of products to the concentration of the reactants, each raised to their respective stoichiometric coefficients.

#### What does the equilibrium constant depend on?

The equilibrium constant Keq of a reaction reflects the ratio of products to reactants at equilibrium and thus is a measure of the extent of the reaction. The Keq depends on the temperature and pressure, but is independent of the reaction rate and of the initial concentrations of reactants and products.

How is active mass expressed?

Here active mass is Active mass is defined as number of grams mol per liter. It is also known as molar concentration or molarity. The concentration of a reacting substance is expressed usually in moles per litre.

How are active masses represented?

How the active mass is represented? Ans: Usually active mass in units of mol dm3 is known to be the molar concentration; expressed as square brackets. [ ]. 5.

## How is the law of mass action related to equilibrium?

The law of mass action is concerned with the position of equilibrium in a reversible reaction i.e. at equilibrium both forward and back reactions are taking place at equal rates. The law of mass action says nothing about this rate but only tells us what the reactant and product concentrations will be at equilibrium.

How is the equilibrium constant of a chemical reaction determined?

The equilibrium constant of a chemical reaction is the value of the reaction quotient when the reaction has reached equilibrium. An equilibrium constant value is independent of the analytical concentrations of the reactant and product species in a mixture, but depends on temperature and on ionic strength.

What are the coefficients of the mass action law?

where a, b, c, d are the coefficients for a balanced chemical equation. The mass action law states that if the system is at equilibrium at a given temperature, then the following ratio is a constant: [C]c[D]d [A]a[B]b = Keq. The square brackets ” [ ]” around the chemical species represent their concentrations.

### Is the law of mass action static or dynamic?

The mass of action law in equilibrium chemistry define before the thermodynamics approach developed. The law of mass action recognized that the chemical equilibrium is a dynamic, not static equilibrium because the reaction rate of the forward reaction is equal to the reaction rate of the backward reaction.