Confused and have questions? We’ve got answers. With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. If you rather get 1:1 study help, try 30 minutes of free online tutoring with Chegg Tutors.

Equilibrium constants

From Biology-Online Dictionary | Biology-Online Dictionary
Jump to: navigation, search

Equilibrium constant

(Science: chemistry) The ratio of the reverse and forward rate constants for a reaction of the type:

a _ B = ab

at equilibrium the equilibrium constant (K) equals the product of the concentrations of reactants divided by the concentration of product and has dimensions of concentration.

kd = (concentration a.concentration B) / (concentration ab).

The affinity constant (Ka) is the reciprocal of the equilibrium constant.

Dimension: moles per litre. In general the concept of kd is more readily understood than that of Ka, for example: in considering the conversion of a to ab by the binding of ligand B, the kd = B when a = ab. Thus kd is equal to the ligand concentration which produces half maximal conversion (response).