Question

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

Answer 1

this happens because water molecules are not tightly packed and have space between them hence when we dissolve the salt in it the salt particles occupy the space between the molecules of the water. thus the water level doesn't rise up

Answer 2

Explanation: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.