What is a substance that can be dissolved?
Dissolving is a process where a substance (solute) forms a solution in a solvent. A substance that can be dissolved is called a soluble substance. Soluble substances can be easily dissolved in a solvent, forming a homogeneous mixture known as a solution.

Characteristics of soluble substances:
- Soluble substances can be broken down into particles that are small enough to mix evenly with the solvent.
- They can form a clear or transparent solution when mixed with a solvent.
- Soluble substances can be separated from the solution through processes like evaporation or filtration.

Factors affecting solubility:
- Temperature: In general, solubility increases with temperature for solid solutes in liquid solvents. However, for gases in liquids, solubility decreases with increasing temperature.
- Pressure: Pressure has a significant effect on the solubility of gases in liquids. Higher pressure can increase the solubility of gases in liquids.

Examples of soluble substances:
- Common salt (sodium chloride) is a soluble substance that readily dissolves in water.
- Sugar (sucrose) is another example of a soluble substance that dissolves easily in water.
- Household vinegar (acetic acid) is a soluble substance that can be dissolved in water to form a solution.
In conclusion, a substance that can be dissolved is known as a soluble substance, which can form a solution when mixed with a solvent. Understanding the characteristics and factors affecting solubility can help in predicting and controlling the dissolution of substances in various solvents.