This equipment should always be used inside Buchner funnels with perforated plates. For 10 points each:
[10e] Name this laboratory equipment. It is commonly folded into fluted or conical configuration to control the rate of recrystallization.
ANSWER: filter paper
[10h] Fluted filter paper and a stemless funnel should be used for this method that removes solid impurities. This gravity-based method avoids recrystallization in the funnel.
ANSWER: hot filtration
[10m] Hot filtration is commonly used to remove this substance that is used to remove colored impurities in solvents. This powder, which cannot be easily decanted, has extremely high porosity because of its surface area of hundreds or thousands of square meters per gram.
ANSWER: activated charcoal [or activated carbon; or granular activated carbon; or GAC]
<Paul Lee , Science - Chemistry - Analytical/Lab>