What does dissociate mean in science

Dissociation is the process by which chemical molecules or ionic compounds such as salts, or complexes break down into simpler constituents such as atoms, ions or radicals, usually in a reversible manner, as do CO 2 and H 2 O at high temperatures.

Dissociation is the opposite of association and recombination. Dissociation accelerates the rate of corrosion and increased pitting in the anode area in concentration cell, for example corroding of metal pipes in water treatment. The corrosion of iron in the presence of hydrogen sulfide and water is also dependent on the dissociation of the hydrogen-sulfide molecule. Dissociation in chemistry is a general process in which molecules separate or split into smaller particles.

The dissociation constant Ka is the ratio of dissociated to undissociated compound. The increase in temperature also leads to a higher dissociation and a higher dissociation constant.

The dissociation degree is the fraction of original solute molecules that have dissociated. In the case of very strong acids and bases, the degree of dissociation is close to 1. Less powerful acids and bases have a lesser degree of dissociation. In aqueous solutions like acids, bases and sulfates, their molecules are partially dissolved in electrically loaded, free-moving particles, known as ions. In electrolytic dissociation, the solutions can conduct electricity and facilitate the electrochemical corrosion of "non-precious" metals due to the positive ions cations and negative ions anions.

However, dissociation also occurs in pure water. Learn about the different types of muscle tissues in this tutorial and the molecular mechanisms of contraction Skip to content Main Navigation Search. Dictionary Articles Tutorials Biology Forum.

Respiration The human respiratory system is an efficient system of inspiring and expiring respiratory gases. Muscle Muscle cells are specialized to generate force and movement. Related Articles The group encompasses Byrne's art-rock solitariness and the dissociation effects in the spare—somewhat Godardian—staging.

That fear—and its attendant dissociation —is what speaks loudest in the haunting photographs of the Provoke Era. There seems to be very little known about dissociation , and somewhat vague theories have been advanced to explain the phenomenon. In certain conditions they are capable of dissociation , and they last for a longer or a shorter time.

Within ten minutes their dissociation was final and absolute. The theory of dissociation has, as far as I know, no opponents. New Word List Word List. Save This Word! See synonyms for dissociation on Thesaurus.