You need to prepare 2.00 L of 0.100 M Na₂CO₃ solution.The best procedure is to weigh out: A)10.6 g Na₂CO₃ and add 2.00 L of water to it. B)21.2 g Na₂CO₃ and add 2.00 L of water to it. C)10.6 g Na₂CO₃ and add water until the final solution has a volume of 2.00 L. D)21.2 g Na₂CO₃ and add water until the final solution has a volume of 2.00 L.

Question

Quizplus · Accepted Answer

To prepare a 0.100 M solution of Na₂CO₃ in 2.00 L, you need to use the molarity equation M = moles/L. For 0.100 M and 2.00 L, you need 0.100 moles/L * 2.00 L = 0.200 moles of the compound. Assuming the formula represents a compound with a molar mass that results in needing 21.2 g for 0.200 moles, option D is correct because it specifies the correct mass and instructs to add water until the final volume is 2.00 L, ensuring the desired concentration.

You Need to Prepare 2