Question

Which statements describe proper use of a filter funnel? Check all that apply.

Cut the filter paper in half before placing it in the funnel.

Fold the filter paper in fourths before placing it in the funnel.

Pour all the liquid through the funnel.

Trap the liquid in the center of the filter.

Answer 1

- Fold the filter paper in fourths before placing it in the funnel. — Correct. Fold the circular paper twice to make a cone that fits the funnel; wet it slightly with solvent so it seals and the liquid flows through.

Incorrect:
- Cut the filter paper in half — Not standard practice; you use the whole circle folded into a cone.
- Pour all the liquid through the funnel — You should pour carefully/slowly (and use rinsing if needed); don’t dump rapidly and overflow the funnel.
- Trap the liquid in the center of the filter — Wrong; the liquid should pass through the paper as filtrate, not be retained in the center.