Question

what is the function of the funnel?

Answer 1

There are many kinds of laboratory funnels: filter funnels, dropping funnels,
powder funnels, separatory funnels and others. The most often funnels are used
for funneling liquids (or solids for powder funnels) from one container to
another. The other function of a funnel is to realize filtration (separation of
the liquid phase from the solid phase). Dropping funnels are used for adding
reagents slowly (drop-wise). Separatory funnels are used in liquid-liquid
extraction to separate the component of a mixture into two immiscible solvent
phases of different densities.