What are 5 things that can dissolve in water?

What Dissolves in Water? 5 Common Examples

Water is often called the "universal solvent" because it can dissolve many substances — but not everything. Here are five everyday items and how they behave when mixed with water.

Salt is one of the most familiar water-soluble substances. When stirred into water, salt crystals break down completely, leaving a clear, uniform solution. This happens because water molecules pull apart the sodium and chloride ions in salt.

Sugar behaves similarly. Whether granulated or powdered, sugar disappears into water without leaving residue, forming a sweet, transparent liquid. This process is why sugar dissolves so well in tea or lemonade.

Coffee, especially in instant form, dissolves easily in hot water. The heat helps break down the coffee particles, creating a smooth beverage. While ground coffee isn’t fully soluble, instant coffee is designed to dissolve completely.

Food coloring is another water-friendly substance. Its liquid form blends instantly and evenly into water, creating vibrant hues without cloudiness. This makes it ideal for experiments and baking.

On the other hand, flour doesn’t truly dissolve. When mixed with water, it creates a cloudy suspension — a sign of a colloid, where tiny particles stay dispersed but don’t dissolve. You’ll notice the mixture feels thicker and may settle over time, unlike the clear solutions formed by salt or sugar.

Interestingly, oil also doesn’t dissolve in water — it separates and floats. But since the original answer mentions food coloring and coffee instead, we’ll stick with those. The key takeaway? Not all substances interact with water the same way. Solubility depends on molecular structure and how well a substance bonds with water molecules.