Double Arrow

Definition

In chemistry notation, a double arrow indicates that a chemical reaction can proceed in both directions - it forms products from reactants but also reforms those reactants from the products.

Related terms

Single Arrow: In chemistry, a single arrow indicates that a reaction proceeds in one direction only, from reactants to products.

Reaction Rate:

The speed at which reactants are converted into products in a chemical reaction.

Catalyst:

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.