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Chemistry, 06.05.2020 02:31 ilovecatsomuchlolol

In chemistry class, a student walks into the lab and finds 1.7 liters (L) of an unknown solution sitting on the counter. The student that created this solution forgot to label the container with its contents and concentration. There is a notebook next to the container that only states, as instructions to make the solution, "add 149 g of NaCl to water". The density of NaCl is 2.16 g/mL and its molar mass is 58 g. Using this information, correctly label the container. In addition, your instructor wants you to formulate the necessary qualitative notes to your notebook that describe the exact amounts of each component in the solution and how you found this information. What will you write on the label and in the notebook?

A) Label: 2.5 M NaCl
Notebook: Divide the mass of NaCl used by the molar mass to get the molarity of the NaCl solution. Then divide the mass of NaCl used and its density to get the volume of NaCl that makes up part of the total volume. Finally, add the volume of NaCl to the total volume to find how the overall volume of the solution. The solution contains 149 g of NaCl and 1,769 mL of water.
B) Label: 2.5 M NaCl
Notebook: Divide the mass of NaCl used by the molar mass to get the molarity of the NaCl solution. Then multiply the mass of NaCl used and its density to get the volume of NaCl that makes up part of the total volume. Finally, subtract the volume of NaCl from the total volume to find how the volume of water used to make the solution. The solution contains 149 g of NaCl and 1,378 mL of water.
C) Label: 1.5 M NaCl
Notebook: Divide the mass of NaCl used by the molar mass to get the number of moles of NaCl used to make the solution. Divide the mass of NaCl used by the total volume of the solution to get the molarity of the NaCl solution. Now, divide the mass of NaCl used by its density to get the volume of NaCl that makes up part of the total volume. Finally, subtract the volume of NaCl from the total volume to find how the volume of water used to make the solution. The solution contains 149 g of NaCl and 1,631 mL of water.
D) Label: 1.5 M NaCl
Notebook: Divide the mass of NaCl used by the molar mass to get the number of moles of NaCl used to make the solution. Divide the mass of NaCl used by the total volume of the solution to get the molarity of the NaCl solution. Now, multiply the mass of NaCl used and its density to get the volume of NaCl that makes up part of the total volume. Finally, subtract the volume of NaCl from the total volume to find how the volume of water used to make the solution. The solution contains 149 g of NaCl and 1,378 mL of water.

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