How would you prepare a 1 M NaCl solution?

To prepare a 1 M NaCl solution, it is important to understand that molarity (M) is defined as the number of moles of solute per liter of solution. Sodium chloride (NaCl) has a molar mass of approximately 58.44 grams per mole.

In the correct method of preparation, dissolving 58.44 grams of NaCl in enough water to make a final volume of 1 liter ensures that the concentration of the NaCl will be exactly 1 mole per liter. This is because you are adding enough solvent (water) to achieve the desired volume of the entire solution after the solute is dissolved.

If you were to dissolve 58.44 grams of NaCl in only 500 mL of water, that would result in a solution that is 2 M, not 1 M, since you would have twice the concentration of solute for that volume. Mixing NaCl with ethanol would not yield a typical aqueous solution of NaCl, as the behavior of the solute in organic solvents can differ significantly from that in water, and the resulting solution would not have the specified molarity. Lastly, adding NaCl directly to 1 liter of ice would not effectively yield a solution at