Which of the following statements describes the correct method of preparation of 1.00 L of a 2.0 M urea solution? ℳ_urea= 60.06 g/mol A)Dissolve 120 g of urea in 1.00 kg of distilled water. B)Dissolve 120 g of urea in 880 g of distilled water. C)Dissolve 120 g of urea in enough distilled water to produce 1.00 L of solution. D)Dissolve 120 g of urea in 1.00 liter of distilled water. E)The density of urea is needed in order to do this calculation.

Question

Quizplus · Accepted Answer

To prepare a 2.0 M solution, you need 2 moles of urea per liter of solution. Since the molar mass of urea is 60.06 g/mol, 2 moles weigh 120.12 g. The correct method involves dissolving 120 g of urea in enough distilled water to make the total solution volume 1.00 L, not the total weight or adding it to a pre-measured volume of water.

Which of the Following Statements Describes the Correct Method of Preparation