The mixture is then diluted slightly with water, and filtered while hot, through #40 filter paper directly into a 100-mL volumetric flask.
(The mixture; is diluted slightly; T:then) (The mixture; filtered; T:while hot; directly into a 100-mL volumetric flask)
The mixture The mixture
is diluted slightly filtered
T:then
T:while hot directly into a 100-mL volumetric flask