Stalagmometer
Product Code : SCL-CLE-11451
Description:
The Stalagmometer is a specialized piece of Science Educational Laboratory Equipment used to measure the surface tension of a liquid by determining the mass or volume of drops of the liquid that fall from the end of a glass capillary tube. This classic method, often attributed to Traube, provides a practical demonstration of intermolecular forces in physical chemistry and physics.
Function: Precisely measures the surface tension of a liquid relative to a reference liquid (like water) by counting the number of drops formed from a fixed volume, or by determining the volume of a single drop.
Material: Constructed from high-quality Borosilicate Glass. This material is composed primarily of silica and boron trioxide, giving it unique properties essential for laboratory use:
High Thermal Resistance: It exhibits low thermal expansion, making it highly resistant to thermal shock (sudden temperature changes).
Chemical Inertness: It resists corrosion from most common laboratory chemicals, ensuring the purity and accuracy of measurements.
Application Focus: A fundamental instrument for teaching and researching the principles of intermolecular forces and capillary action within STEM curricula.
Usage:
The Stalagmometer is essential for practical demonstrations and quantitative experiments in academic labs:
Measuring Surface Tension: Used in physical chemistry labs to calculate the surface tension of various liquids (e.g., water, alcohol, surfactant solutions) using the drop weight method or drop number method.
Studying Concentration Effects: Allows students to experimentally investigate how the addition of solutes (like salt or soap/detergent) affects the surface tension of a solvent.
Demonstrating Cohesion: Provides a direct, measurable link between the cohesive forces within a liquid and the size of the drop formed, enhancing the understanding of fundamental liquid properties.
Quality Control: Can be used in higher education and industrial settings to analyze the properties of formulated liquids, such as paints, inks, and cosmetic components.
