Question

\(40%\) by weight solution will contain how much mass of the solute in 1L solution, density of the solution is \(1.2\mathrm{g / mL}\)?

• A. 480 g
• B. 48 g
• C. 38 g
• D. 380 g

Hint:

Always convert volume to mL when density is given in g/mL.

Answer 1

The Correct Option is A

Step 1: Underlying Concept:
Mass of solution = Volume × Density. Mass of solute = (% by weight/100) × Mass of solution.
Step 2: Explanation:
Volume = 1 L = 1000 mL. Density = 1.2 g/mL.
Mass of solution = \(1000 \times 1.2 = 1200\) g.
Mass of solute = \(40% \times 1200 = \frac{40}{100} \times 1200 = 480\) g.
Step 3: Conclusion:
480 g