Assertion: boiling oxalic acid | /r/HasProperty | maintained at this level of concentration
Facets:
value: by the use of a condenser
type: MANNER
Source sentences:
text: 1 and 2 were conducted over periods of 7 hours using 10% concentration boiling oxalic acid, which was maintained at this level of concentration by the use of a condenser which returned all material boiled off to the metal samplecontaining flask during the tests.