Will It Mix

Solubility is the ability of a substance to dissolve in a liquid, like water. When a substance dissolves, it breaks apart and spreads out evenly in the liquid. The liquid that does the dissolving is called the solvent. The substance that gets dissolved is called the solute.

For example, when you stir sugar into water, the sugar disappears because it has dissolved. Sugar is the solute and water is the solvent. Together, they make a solution, which is a type of mixture where everything is mixed so well, you can’t see the separate parts.

Not everything dissolves in water. If you pour oil into water, the oil stays on top. This means oil is not soluble in water. Substances that do not dissolve are called insoluble. Sand is another example of something that is insoluble in water. When you mix sand and water, the sand just sinks to the bottom.

Solubility is important in many parts of life. When you make lemonade, the sugar must dissolve in the water to taste sweet. In nature, rivers carry dissolved minerals that help plants grow. In medicine, some pills need to dissolve in your stomach so your body can use them. Scientists test solubility to find out which substances can mix and which cannot.

Temperature can also affect solubility. Sometimes, substances dissolve better in warm liquids than in cold ones. That’s why sugar dissolves faster in hot tea than in iced tea.

Interesting Fact: Some fish can only live in water with certain dissolved minerals. The right solubility helps keep their homes healthy!