how much water must be added to a 8-liter solution that contains 8% of baneberry to get a solution that contains 5% extract of baneberry?

Question

the amount of water must be __ liters

Answer 1

Since the amount of baneberry is the same before and after you add water,

 

C_iV_i = C_fV_f  where the C's represent concentration and V, volume.

 

8*8 = 5*V_f

 

V_f = 64/5 = 12.8 liters

 

 

You should add 12.8 - 8 = 4.8 liters to get a 5% baneberry solution.