Dissolution can be a physical or a chemical change based on the solute and the solvent. If the solute breaks up into individual atoms and reacts with the solvent then a chemical as well as physical change takes place. If the solute just mixes up with the solvent and loses its solid or gaseous state then it is a physical change.
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Solute is the substance being dissolved and the solvent is the liquid substance in which the solute is being dissolved. The result is a solution of the solute. For example when salt, a solute, is dissolved in a solvent, the water, and the resulting solution is a salt solution.Is Dissolving a Chemical or Physical ChangeChemical change: chemical change happens when the solute in question breaks down into individual atoms or molecules and combines with the solvent through the formation of chemical bonds.
for example: when salt is dissolved in vinegar which is chemically called as acetic acid, the salt breaks down into its individual atoms and reacts with the acetic acid to form weak hydrochloric acid. Here a chemical reaction has taken place and a chemical bond has formed.Physical change: It also has taken place in the above example. Salt in solid form, dissolves in vinegar and loses its state.
It becomes a part of the liquid by breaking down into individual molecules.image of solutionPhysical change explained: Let us suppose that salt is dissolved in water, in this case the salt loses its physical solid state and breaks into individual molecules and combines with water. However no chemical bonds are formed between salt and water. When the water is evaporated, the salt remains at the end again in its original physical state.
Thus the process of dissolution can involve physical as well as chemical changes based on chemical reactivity of the solute and the solvent used.Conclusion to whether Dissolution is a Physical or Chemical ChangeIn the process of dissolution both chemical and physical or only physical changes can take place. The chemical changes are based on the chemical reactivity of solute and solvent. It is also important to know that certain dis-solutions acquire the nature of chemical change when the temperature is changed.