Indicate which of the following common laboratory devices will deliver 25 mL of a solution with the greatest precision.
A) a 50 mL Erlenmeyer flask (without volume divisions)
B) a 50 mL beaker (with volume divisions every 10 mL)
C) a 50 mL graduated cylinder (with volume divisions every 2 mL)
D) a 25 mL Erlenmeyer flask (without volume divisions)
E) a 25 mL volumetric pipette (with a to-deliver error of 0.01 mL at 25°C)

Question

Quizplus · Accepted Answer

A volumetric pipette is designed to deliver a specific volume, with a known and small error, and is the most precise device for delivering a specific volume. The other devices listed do not have a defined accuracy for measuring a specific volume, making it more difficult to achieve precise measurement.

Indicate Which of the Following Common Laboratory Devices Will Deliver