About: http://webisa.webdatacommons.org/65477907

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The noncarbonate hardness, or permanent hardness", is caused by sulfates and chlorides of calcium and magnesium and other salts and cannot be removed by boiling.
http://www.w3.org/ns/prov#wasQuotedFrom	ku.edu