Chemistry concentration dilution

Question

What is the concentration when 0.5mol/dm3 of copper sulfate used is 8cm3 with water 2dm3?

Answer 1

The question isn't quite clear to me, but maybe what is meant is the following.

What is the concentration when 8 cm3 of 0.5 mol/dm3 of copper sulfate is diluted with water to 2 dm3? If this is the case, you can use the formula V1M1 = V2 M2.

Before using this formula, you want to make sure the volumes (V1 and V2 are in the same units).

Changing 8 cm3 to dm3: 8 cm3 x 1 dm3/1000 cm3 = 0.008 dm3

(0.008 dm3)(0.5 mol/dm3) = (2 dm3)(x M)

x = 0.002 M