For a neutral solution at 25 °C, what is the concentration of H3O+ ions?
Understand the Problem
The question is asking for the concentration of H3O+ ions in a neutral solution at a specific temperature (25 °C). In a neutral solution at this temperature, the concentration is typically defined based on the self-ionization of water.
Answer
1.0 * 10^-7 M
The final answer is 1.0 * 10^-7 M
Answer for screen readers
The final answer is 1.0 * 10^-7 M
More Information
At 25°C, pure water has a dissociation constant (Kw) of 1.0 x 10^-14, thus making the concentration of hydronium ions [H3O+] in a neutral solution 1.0 x 10^-7 M. This is due to water self-ionizing to produce equal amounts of H3O+ and OH- ions.
Tips
A common mistake is confusing the neutral concentration value with that of an acidic or basic solution, where [H3O+] would be higher or lower, respectively.
Sources
- Neutral Solution - CHEMISTRY COMMUNITY - Laurence Lavelle - lavelle.chem.ucla.edu
- What is the concentration of hydrogen ions in a neutral solution? - quora.com
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