Answer:
The volume required is 25 mL.
Explanation:
Given data:
Volume taken form stock solution to make new solution = V1 = ?
Concentration of stock solution = C1 = 20 mg/ L
Concentration of new solution = C2 = 10 mg/ L
Final volume of new solution = V2 = 50 mL
Formula:
C1V1 = C2V2
V1 = C2V2 / C1
Now we will put the values in formula,
V1 = (10 mg /L × 50 mL) / 20 mg / L
V1 = (500 mg /L .mL) / 20mg / L
V1 = 25 mL
