1. Understand the Concept

* Solution: A homogeneous mixture of two or more substances. In this case, copper chloride (solute) is dissolved in water (solvent).

* Mass of Solution = Mass of Solute + Mass of Solvent

2. Calculate the Mass of the Solution

* Mass of solute (copper chloride): 40 grams

* Mass of solvent (water): 120 grams

* Mass of solution = 40 grams + 120 grams = 160 grams

Therefore, the mass of the solution is 160 grams.