What is the mass ratio of ethylene glycol (, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250 mL of 0.25 molar aqueous solution?

Question

Canvas Classes · Accepted Answer

Strategy:
 Calculate the moles of ethylene glycol required for each solution and compare them.

Step 1: Calculate moles for 500 g of 0.25 molal solution
Molality () . Solvent mass  (assuming dilute solution).

Step 2: Calculate moles for 250 mL of 0.25 molar solution
Molarity () . Volume .

Step 3: Determine mass ratio
Ratio .

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