5.25.00 mL of 0.0250 M solution of CuSO4 was placed in 100 mL volumetric flask, diluted to the mark line and mixed. Then 5.00 mL of this solution was picked up and placed in 250 mL volumetric flask. Show how you calculate (show numbers) the final concentration of the solution.

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.