pH

{
  "id": "MLC-T-ENV-020815",
  "term": "pH",
  "field": "Environment",
  "definition": "1. The measure of acidity or alkalinity of a chemical solution, from 0-14. Anything neutral, for example, has a pH of 7. Acids have a pH less than 7, bases (alkaline) greater than 7.\n\n2. A measure of the acidity of a solution. pH is equal to the negative logarithm of the concentration of hydrogen ions in a solution. A pH of 7 is neutral. Values less than 7 are acidic, and values greater than 7 are basic.\n\n3. An expression of the intensity of the basic or acid condition of a liquid; may range from 0 to 14, where 0 is the most acid and 7 is neutral. Natural waters usually have a pH between 6.5 and 8.5.\n\n4. A measure of the acidity pr alkalinity of a material, liquid or solid. pH is represented on a scale of 0 to 14 with 7 representing a neutral state, 0 representing the most acid and 14, the most alkaline.\n\n5. A measure of the hydrogen ion concentration of water or wastewater; expressed as the negative log of the hydrogen ion concentration in mg/l. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic.\n\n6. A measure of the acidity or alkalinity of water.\n\n7. A scale that denotes how acidic or basic a substance is. Pure water has a pH of 7.0 and is neither acidic nor basic. For more information, see the pH page (http://www.epa.gov/acidrain/measure/ph.html).\n\n8. A measurement of the acidity or alkalinity level of a solution.\n\n9. A way of measuring the acidity of an object. Values of pH can range from 0-14, with 0 being the most acidic, and 14 being the least acidic. For more information on pH see Acid Rain and the pH Scale see Acid Rain and the pH Scale (http://www.epa.gov/acidrain/education/site_students/phscale.html#chart).\n\n10. A measure of acidity or alkalinity on a scale of 0 to 14 where 7 is neutral. A pH less than 7 is acid and a pH greater than 7 is alkaline or base.\n\n11. A measure of acidity or alkalinity. The pH scale ranges from zero to 14, with a value of 7 considered neutral. The lower a value, the higher the acidity, and the higher the value, the higher the alkalinity.",
  "subject": "Water",
  "references": [
    "Environmental Issues Terms & Acronyms; Pesticides Glossary",
    "Underground Storage Tank Sites Guide Glossary; Glossary of Technical Terms: Office of Underground Storage Tanks",
    "RCRA Glossary of Terms; Terms of Environment",
    "Aquatic Biodiversity Glossary",
    "National Pollutant Discharge Elimination System (NPDES) Glossary; NPDES Permit Writers Manual Glossary",
    "Chesapeake Bay Glossary",
    "Acid Rain Glossary",
    "Superfund for Students and Teachers Glossary",
    "Acid Rain Students Site: Glossary",
    "I-BEAM Glossary of Terms",
    "AgSTAR Handbook Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/ph/"
}