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# Glassware Accuracy Mark as Favorite (64 Favorites)

LAB in Accuracy, Measurements, Accuracy, Error Analysis, Error Analysis. Last updated October 14, 2019.

### Summary

In this lab, students use different types of laboratory glassware to measure 50 mL of water and determine the accuracy of each piece of glassware.

High school

### Objectives

By the end of this lesson, students should be able to

• determine the accuracy of different pieces of glassware.
• explain why some pieces of glassware produce better accuracy than others.
• calculate percent error.

### Chemistry Topics

This lesson supports students’ understanding of

• Accuracy

### Time

Teacher Preparation: 10 minutes

Lesson: 60 minutes

### Materials

For each group:

• Beaker
• Burette capable of measuring exactly 50 mL

### Safety

There are no special safety considerations for this lab.

### Teacher Notes

• As long as each piece of glassware is capable of holding 50 mL, the exact size is not important.
•  If groups have different sized beakers, flasks, and cylinders, discuss which size was the most accurate and why.
• When measuring the mass of water from the burette, have students use a separate beaker to hold the water, since the burette will be difficult to place on the scale.

### For the Student

###### Lesson

Purpose

To determine which piece of glassware provides the greatest accuracy when measuring a 50 mL sample of water.

Materials

• Beaker
• Burette capable of measuring exactly 50 mL

Procedure

1. Obtain one clean & dry beaker, Erlenmeyer flask, graduated cylinder, volumetric flask and burette capable of measuring exactly 50 mL.
2. Tare (zero) the balance.
3. Place the beaker on balance. Record tare mass of beaker below.
4. Fill test beaker exactly to the 50 mL line with water. Record mass of H2O plus beaker.
5. Repeat steps three and four for each of the other pieces of glassware and record readings below.

Note: use a different beaker and obtain tare mass for vessel to hold the 50 mL sample from the burette.

Results/Observations
50 ml H2O from: Tare (g) Total Mass (g)
Beaker