What is the final mass/volume (m/v)% of a KOH solution that is prepared by diluting 110 mL of a 6.0% (m/v) KOH solution to 330 mL?
A)12%
B)2.0%
C)1.0%
D)18%
E)6.0%

Question

Quizplus · Accepted Answer

Using the formula:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Plug in the values:

6.0%(m/v) x 110 mL = C2 x 330 mL

C2 = 2.0%(m/v)

Therefore, the final mass/volume (m/v)% is 2.0%. The answer is B.

What Is the Final Mass/volume (M/v)% of a KOH Solution