Understanding the Notation on Laboratory Flask: TC 25 250 mL

What does the notation "TC 25 250 mL" on a laboratory flask mean?

Can you explain the significance of each part of the notation?

Explanation of "TC 25 250 mL" Notation

The notation "TC 25 250 mL" on a stoppered flask indicates that the flask is designed to hold a nominal volume of 250 mL, with a tolerance of ±0.25 mL. This means that the actual volume of liquid inside the flask may vary slightly, but it will be within the range of 249.75 mL to 250.25 mL.

When looking at the notation "TC 25 250 mL" on a laboratory flask, it is important to understand the meaning behind each component. This notation provides key information about the flask's intended volume and accuracy.

Breakdown of the Notation:

1. TC: TC stands for "to contain." It signifies that the flask is designed to hold a specific volume of liquid, in this case, 250 mL. However, there may be slight variations in the actual liquid volume due to factors like temperature and calibration.
2. 25: The number 25 represents the tolerance or accuracy of the flask. It indicates that the volume of the flask can deviate by ±0.25 mL from the stated volume of 250 mL. This tolerance is crucial for precise measurements and ensures consistency in experiments.
3. 250 mL: This signifies the nominal volume of the flask, which is the approximate volume it is intended to hold. In the case of "TC 25 250 mL," the flask is designed for a nominal volume of 250 mL.

Overall, the notation "TC 25 250 mL" provides users with essential information about the flask's volume capacity and tolerance. It serves as a guide for accurate measurements and helps maintain the reliability of experiments conducted using the flask.