Choose the correct word:
When a chemical system is at dynamic equilibrium, there (are/ are not) visible changes in the system.
In a saturated solution, the colour intensity is (greater/ the same/ less) over time.
In a saturated solution, the mass of undissolved particles is (the same/ less/ greater) over time.
When a chemical system is at dynamic equilibrium, the solution must be in a closed system. This means that the volume of water is (changing/ constant), the amount of solute is (constant/changing) , and the temperature is (constant/ changing)