Dissolving Salt In Water

You can add salt slowly to see approximately how much can be dissolved in a given amount of water (at a given temperature). You can dissolve more salt by adding more water or heating it up. When stirring table salt into water, the visible white crystals disappear into a clear liquid.

This highlights waters capability to break down the structure of solid salts. The central question is how liquid water molecules overcome the powerful internal forces holding the salt together. When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules.

When common table salt, known scientifically as sodium chloride, is mixed with water, it appears to simply disappear. This everyday phenomenon of dissolution is a fundamental process in chemistry and biology, impacting everything from the taste of our food to the functioning of living organisms. Salt, also known as sodium chloride (NaCl), is a compound that dissolves easily in water.

So, how does it happen? Read on to find out! Before we can understand how salt dissolves in water, we need to understand a little bit about the structure of salt and water molecules. Learn why dissolving salt in water may be considered a chemical change or a physical change, depending on the definition and the reaction. See arguments for both sides and examples of other compounds that dissolve in water.

We will first examine the process that occurs when an ionic compound such as table salt (sodium chloride) dissolves in water. Water molecules move about continuously due to their kinetic energy. The chemically correct way to dissolve a salt in water involves precise weighing of the salt, partial filling of the container with de-ionized water, thorough mixing often aided by stirring or heating, and careful adjustment to a final volume under controlled temperature conditions.

Project an image and have students model what happens when salt dissolves in water. Show students a series of four pictures to help explain the process of water dissolving salt. When a salt is added to water, it dissolves into its component molecules until as many salt ions as the water can hold are floating around the hydrogen and oxygen molecules.