Assertion: calcium ion | /r/HasProperty | free
Facets:
value: in solution
type: OTHER
value: essentially
type: DEGREE
value: in fresh water below ph
type: LOCATION
Source sentences:
text: In fresh water below pH 11 or so, calcium ions are essentially free.
text: So I guess the issue is to what extent the calcium ion is free in solution and to what extent it's bound to the acetate ions.