Answer to Question #59566 in General Chemistry for gene

Question

A solution is prepared by dissolving 51.7 grams of ethylene glycol in 0.2 kilograms of water. the final volume of the solution is 381 millimeters for this solution calculate the concentration in parts per million. the molar mass of ethylene glycol is 62.07 g*mol^-1 and the molar mass of water is 18.02g*mol-1. The density of ethylene glycol is 1.114 g*mL^-1 and water is 1.0 g*mL^-1. Don't forget to include the unit symbol in the answer

Answer 1

the final volume of the solution is 245.3 mL [(51.7g+200g)/1.026g/mL], not 381 milliliters.

Because
W=(51.7/251.7)*100%= 20.54 %, so density of 20.54 % ethylene glycol solution = 1.026 g/mL (from Dictionary of Chemistry)
Concentration [ppm] = weight/volume [mg/L]
245.3 mL = 0.2453 L
51.7 grams = 51700 mg
51700 mg / 0.2453 L = 210762.33 ppm