OH- ion
[/oʊ eɪtʃ maɪnəs aɪ.ən/ or /ɔːeɪtʃ maɪnəs aɪ.ən/]
nounpl: OH- ions
íon hidróxido
1. A negatively charged ion consisting of one oxygen atom bonded to one hydrogen atom, commonly found in basic or alkaline solutions
The OH- ion is responsible for the basic properties of sodium hydroxide solution.
O íon hidróxido é responsável pelas propriedades básicas da solução de hidróxido de sódio.
2. A hydroxide ion formed when a water molecule loses a proton in basic conditions
In water, the concentration of OH- ions increases as the pH rises above 7.
Na água, a concentração de íons hidróxido aumenta conforme o pH sobe acima de 7.
The OH- ion is fundamental to chemistry education and industrial applications worldwide. In Brazil, this term is essential in high school and university chemistry courses. The concept is taught as part of pH and acid-base chemistry, which is critical for understanding water treatment, industrial processes, and environmental science. The notation 'OH-' is universally recognized across all Portuguese-speaking countries.
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