Here's why:
* Concentration is a measure of how much solute (salt in this case) is dissolved in a given amount of solvent (water).
* A solution is more concentrated if there's a higher amount of solute per unit of solvent.
To figure out which solution is more concentrated, we need to know:
* Volume of the first solution: 5 grams of salt in 10 mL of water? 10 liters of water? The volume is missing!
* Volume of the second solution: 18 grams of salt in 90 mL of water? 90 liters of water? Again, the volume is missing!
Example:
Let's say:
* Solution 1: 5 grams of salt in 100 mL of water
* Solution 2: 18 grams of salt in 90 mL of water
In this case, to compare the concentrations, we could calculate the concentration in grams per milliliter (g/mL):
* Solution 1: 5 g / 100 mL = 0.05 g/mL
* Solution 2: 18 g / 90 mL = 0.2 g/mL
Solution 2 would be more concentrated because it has a higher amount of salt per milliliter of water.
