Question

3 12 g of nacl (salt) are dissolved into a beaker containing 50 ml of water at room temperature. how could the saltwater solution be diluted? a the solution cannot be diluted b to dilute the solution, add more salt and water in the original proportion c to dilute the solution, add more salt d to dilute the solution, add more water

Explanation:

Dilution of a solution means reducing the concentration of the solute (in this case, NaCl). The formula for concentration \(C=\frac{n}{V}\) (where \(n\) is the amount of solute and \(V\) is the volume of the solution). If we add more solvent (water), while keeping the amount of solute constant, the value of \(C\) (concentration) will decrease.

• Option A: A solution can be diluted. So, this option is incorrect.
• Option B: Adding more salt and water in the original proportion will keep the concentration \(C = \frac{n}{V}\) the same (since \(\frac{\Delta n}{\Delta V}=\frac{n}{V}\)), so it does not dilute the solution.
• Option C: Adding more salt will increase the concentration \(C=\frac{n}{V}\) (as \(n\) increases while \(V\) is constant or changes less proportionally if some water is also added in an incorrect way).
• Option D: Adding more water (\(V\) increases, \(n\) is constant) will decrease the concentration \(C=\frac{n}{V}\), which is dilution.

Answer:

D. To dilute the solution, add more water