Question

A stock solution of sodium sulfate NaSO4 has a concentrate of 1.00 m. The volume of this solution is 50 ml. What volume of 0.25 M solution could be made from the stock solution

Answer 1

200 mL

Step-by-step explanation:

Concept tested: Dilution formula

We are given;

• Concentration of stock solution as 1.00 M
• Volume of the stock solution as 50 mL
• Molarity of the dilute solution as 0.25 M

We are required to calculate the volume of diluted solution;

• The stock solution is the original solution before dilution while diluted solution is the solution after dilution.
• Using the dilution formula we can determine the volume of diluted solution;

M1V1 = M2V2

Rearranging the formula;

V2 = M1V1 ÷ M2

= (1.00 M × 50 mL) ÷ 0.25 M

= 200 mL

Therefore, a volume of 200mL of 0.25 M solution could be made from the stock solution.