1. Understanding the Terminology

* 5% NaCl solution: This means there are 5 grams of NaCl (sodium chloride) in every 100 grams of solution.

* Molarity: Molarity (M) is defined as the number of moles of solute per liter of solution.

2. Calculations

* Step 1: Convert grams of NaCl to moles.

* The molecular weight of NaCl is approximately 58.44 g/mol.

* Moles of NaCl = (5 g NaCl) / (58.44 g/mol) = 0.0855 mol NaCl

* Step 2: Calculate the volume of the solution in liters.

* Assuming a density of 1 g/mL for the solution (which is close for dilute solutions), 100 grams of solution is equivalent to 100 mL.

* Convert mL to liters: 100 mL = 0.1 L

* Step 3: Calculate the molarity.

* Molarity (M) = (Moles of NaCl) / (Volume of solution in liters)

* M = (0.0855 mol) / (0.1 L) = 0.855 M

Therefore, a 5% NaCl solution has a molarity of approximately 0.855 M.

Important Notes:

* The density of the solution can slightly vary depending on the temperature. For more precise calculations, you would need to know the specific density of your 5% NaCl solution.

* This calculation assumes the 5% concentration is weight/weight (w/w). If it's weight/volume (w/v), the calculation would be slightly different.