Is Diluting a Chemical Change?

A physical change is a change in the state (Figure 1) or properties of matter without any accompanying change in its chemical composition (the identities of the substances contained in the matter), such as dissolution and dilution.

Is diluting an acid a chemical change?

During dilution, the amounts of an acid or base in solution do not change- it is the volume of the solution that increases- so that the concentration decreases. The pH increases when a solution of an acid is diluted.

Is dissolving a chemical change?

Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed. Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state. ... It has not combined with the water to cause a chemical reaction.