PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Typically, it will be necessary to adjust the pH of the bath to within the desired moderate pH range, which is usually a strong base such as hydroxide to the bath, or when the pH becomes too high by adding a strong acid, such as sulfuric acid or other mineral acids.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com