Hydrogen ions
Hydrogen Ions (H+)
Hydrogen ions (pronounced: /ˈhaɪdrədʒən ˈaɪɑːn/), also known as protons, are atoms of hydrogen that have lost their electrons, resulting in a positively charged ion.
Etymology
The term "hydrogen ion" is derived from the Greek word "hydro", meaning water, and "genes", meaning forming. This is because hydrogen is capable of forming water when it reacts with oxygen.
Definition
In chemistry, a hydrogen ion is usually referred to as a proton, as it is the hydrogen atom minus its electron. Hydrogen ions are extremely reactive and play a crucial role in many fundamental chemical reactions.
Role in pH
Hydrogen ions are central to understanding the concept of pH, which is a measure of the hydrogen ion concentration in a solution. The pH scale is logarithmic, meaning that each unit represents a tenfold difference in ion concentrations.
Related Terms
- Acid: A substance that can donate a hydrogen ion to another substance.
- Base: A substance that can accept a hydrogen ion from another substance.
- pH: A measure of the hydrogen ion concentration in a solution.
- Proton: Another name for a hydrogen ion, especially in the context of acid-base reactions.
See Also
External links
- Medical encyclopedia article on Hydrogen ions
- Wikipedia's article - Hydrogen ions
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