Question

. A 10mL sample of an aqueous copper sulfate solution is diluted with distilled water in a laboratory to a final volume of 250mL. The concentration of the diluted solution was found to be 0.274g/L. What was the initial concentration of the CuSO4 solution?

Answer 1

V₁S₁=V₂S₂        Where, V₁= 10 mL, V₂=250 mL, S₂= 0.274 g/L

S₁ = (250×0.274) /10 g/mL

    = 6.85 g/mL

Initial concentration of the CuSO₄ solution is 6.85g/mL.