Hydrogen ion

{
  "id": "MLC-T-MET-006320",
  "term": "Hydrogen ion",
  "field": "Meteorology and atmospheric science",
  "definition": "A single proton (H+) that has been stripped of its electron, which in aqueous atmospheric systems like cloud droplets or raindrops exists as the hydronium ion (H3O+). The concentration of hydrogen ions determines the acidity of a solution, measured on the pH scale. Unpolluted rainwater has a slightly acidic pH of about 5.6 due to dissolved carbon dioxide, while acid rain, containing strong acids from pollution, has a pH below this value.",
  "url": "https://mlchart.com/terminology/meteorology/hydrogen-ion/"
}