Question

Select the most appropriate tool for each measurement.

Exactly 200.00 mL salt solution:

A 0.02-mL acid solution:

Approximately 400 mL water:

Exactly 77.5 mL methanol:

Answer 1

- Exactly 200.00 mL salt solution — 200 mL volumetric flask (Class A).
(Volumetric flasks are calibrated to give a single very accurate volume.)

- 0.02 mL acid solution — adjustable micropipette (P20, 20 µL).
(0.02 mL = 20 µL; a P20 pipette gives precise delivery in this range.)

- Approximately 400 mL water — 500 mL beaker (or large graduated cylinder).
(A beaker is fine for approximate volumes; use a 500 mL size for convenience.)

- Exactly 77.5 mL methanol — 100 mL burette.
(A burette lets you deliver an adjustable volume with ~0.1 mL resolution for an exact 77.5 mL.)