What volume of 0.350 M HNO3 can be made from 150mL of 6.6 M HNO3?

Question

What volume of 0.350 M HNO₃ can be made from 150mL of 6.6 M HNO₃?

Answer 1

You can use V1M1 = V2M2 for this problem.

(159 ml)(6.6 M) = (x ml)(0.35 M)

x = 2829 ml = 2800 ml = 2.8 L (2 sig figs)

Answer 2

In dilution problems, the key is to remember that amt of solute in final more dilute solution remains same as in the original concentrated solution.

Moles of solute in concentrated initial solution = molarity of sol × liters of sol

6.6 × 0.15 L = 0.99 mole of HNO3

Now determine the volume of final solution using same no of moles in final solution which has the molarity of .350M

Volume = 0.99 moles÷.350M = 2.8 liters