Question

why is the volume of solution does not change when salt is dissolved into it?​

Answer 1

Because when salt is dissolved in a solvent its particles occupy empty space between molecules of the solvent hence the volume remains constant.

Answer 2

Answer:

volume of a solution does not change because we know that particles of matter have space between them and when we dissolve salt the space get occupied by particles of salt.

Explanation:

When you add table salt (sodium chloride, NaCl) to water, the salt dissolves into ions, Na+ and Cl-. The volume increases by a small factor, but the mass increases by a bigger factor.