Chemistry, asked by yashgahlot365, 1 year ago

Why is Ka important in chemistry?

Answers

Answered by veerukhugar
1

Hey mate here we go

*The acid dissociation constant is the equilibrium constant of the dissociation reaction of an acid and is denoted by Ka.

*This equilibrium constant is a quantitative measure of the strength of an acid in a solution.

*Ka is commonly expressed in units of mol/L. There are tables of acid dissociation constants, for easy reference. For an aqueous solution, the general form of the equilibrium reaction is:

HA + H2O ⇆ A- + H3O+

where HA is an acid which dissociates in the conjugate base of the acid A- and a hydrogen ion that combines with water to form the hydronium ion H3O+.

When the concentrations of HA, A-, and H3O+ no longer change over time, the reaction is at equilibrium and the dissociation constant may be calculated:

Ka = [A-][H3O+] / [HA][H2O]

where the square brackets indicate concentration. Unless an acid is extremely concentrated, the equation is simplified by holding the concentration of water as a constant:

HA ⇆ A- + H+

Ka = [A-][H+]/[HA]

The acid dissociation constant is also known as the acidity constant or acid-ionization constant.

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