Answer
V2 = 21.13 mL
Step-by-step explanation
Given:
Initial volume (V1) = 50.0 mL
Initial concentration (C1) = 3.00 M
Final concentration (C2) = 7.10 M
Required: The volume to be added to make 7.10 M concentration
Solution:
To solve this problem, we use the following formula
C1V1 = C2V2 where C1 and C2 are initial and final concentration, V1 and V2 are initial and final volume.
So we want V2, lets re-arrange the equation.
V2 = C1V1/C2
V2 = (3.00 M x 50.0 mL)/7.10 M
V2 = 21.13 mL