2) A stock solution of a dye is labelled with a concentration of M/5000. Three 250 cm3 conical flasks (A, B, and C) were set up. The following amounts of dye solution were added to each flask:

(A) 25 cm3

(B) 50 cm3 and

(C) 100 cm3.

a) What is the concentration of dye in the stock solution?

b) Water is added to each flask, bringing the total volume of the flask up to 250 cm3. What is the concentration now of the dye in each flask?