Describe in detail how you would make one molar solution of sodium chloride.

Do I add the atomic masses of Na and Cl and then find the mols?

And the after that you would just add 1L of water, correct?

Almost.

Yes, you add atomic mass Na to atomic mass Cl. Weigh that amount of NaCl, dissolve it in a litle water, then make to a final volume of 1 L. Note that this is NOT the same as adding 1 L of water. If you weigh 1 mol NaCl and add 1 L water the final volume will be MORE than 1 L. To get the final volume to be 1 L, one must dissolve the NaCl in a little water, then add enough water to make a final volume of 1 L.

To make a one molar (1M) solution of sodium chloride (NaCl), you need to follow these steps:

Step 1: Calculate the amount of sodium chloride needed
- Firstly, determine the molar mass of NaCl. The atomic mass of sodium (Na) is approximately 22.99 g/mol, and the atomic mass of chlorine (Cl) is approximately 35.45 g/mol. Therefore, the molar mass of NaCl is 22.99 + 35.45 = 58.44 g/mol.
- Next, multiply the desired molarity (1M) by the molar mass of NaCl to calculate the amount of NaCl required per liter (L) of solution: 1 mol/L x 58.44 g/mol = 58.44 g/L.

Step 2: Weigh out the required amount of NaCl
- Using a balance or scale, measure out precisely 58.44 grams of solid sodium chloride. Ensure accurate weighing to maintain the desired molarity.

Step 3: Dissolve NaCl in a solvent (typically water)
- Pour the measured amount of NaCl into a clean, dry container.
- Add a small amount of distilled or deionized water to partially dissolve the NaCl and create a concentrated solution. Mix thoroughly to ensure complete dissolution. Additional water can be added in subsequent steps.

Step 4: Add water to achieve the final volume
- Gradually add more distilled or deionized water to the concentrated solution while stirring until the final volume is reached. In this case, you would add water until you reach a volume of 1 liter (1L).
- Continue stirring until the sodium chloride is completely dissolved in the solution.

It is important to note that when dissolving sodium chloride in water, the final volume of the solution will be slightly greater than 1L due to the volume occupied by the dissolved NaCl. Therefore, it is recommended to use a volumetric flask or a measuring cylinder to ensure accurate measurement of the final volume.

Overall, the process involves accurately weighing out the required amount of NaCl and then dissolving it in the desired volume of water to obtain a 1M solution of sodium chloride.