Question

In a solution, which pair of actions could combine to keep a concentration constant?(1 point)
Responses

adding water, then adding solute
adding water, then adding solute

adding solute, then evaporating water
adding solute, then evaporating water

adding water, then removing solution
adding water, then removing solution

adding solute, then removing solution

Answer 1

The pair of actions that could combine to keep a concentration constant is:

**adding water, then removing solution**.

These actions can offset each other; adding water dilutes the solution, while removing some solution concentrates it back to the original concentration, assuming the amounts are appropriate.