Formation Reaction Definition

One mole of product is made in a formation reaction.
One mole of product is made in a formation reaction. iStock Vectors, Getty Images
By
Anne Marie Helmenstine, Ph.D.
Anne Marie Helmenstine, Ph.D.
Chemistry Expert
  • Ph.D., Biomedical Sciences, University of Tennessee at Knoxville
  • B.A., Physics and Mathematics, Hastings College
Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels.
Learn about our Editorial Process
Updated on July 08, 2019

A formation reaction is a reaction where the one mole of product is formed.

Blue liquid solutions in flasks
Read More
Hydration Reaction Definition
By Anne Marie Helmenstine, Ph.D.

Formation Reaction Example

Hydrogen and oxygen combine to form water by the formula:
2 H2 + O2 → 2 H2O
The formation reaction of this process is:
H2 + ½ O2 → H2O

Format
mla apa chicago
Your Citation
Helmenstine, Anne Marie, Ph.D. "Formation Reaction Definition." ThoughtCo, Aug. 25, 2020, thoughtco.com/definition-of-formation-reaction-605143. Helmenstine, Anne Marie, Ph.D. (2020, August 25). Formation Reaction Definition. Retrieved from https://www.thoughtco.com/definition-of-formation-reaction-605143 Helmenstine, Anne Marie, Ph.D. "Formation Reaction Definition." ThoughtCo. https://www.thoughtco.com/definition-of-formation-reaction-605143 (accessed April 18, 2024).