Final answer:
The molarity of a NaCl solution is calculated by dividing the moles of NaCl, which is determined from its mass and molar mass, by the volume of the solution in liters.
Step-by-step explanation:
Calculating Molarity of a Sodium Chloride Solution
To calculate the molarity (M) of a solution, you need to know the number of moles of solute (in this case, sodium chloride or NaCl) and the volume of the solution in liters. The formula to calculate molarity is:
Molarity (M) = Moles of solute / Volume of solution in liters
First, convert the mass of NaCl from grams to moles using the molar mass of NaCl, which is approximately 58.44 grams/mole. Since you have 9.1 g of NaCl, the calculation will be:
Moles of NaCl = 9.1 g / 58.44 grams/mole
Then, convert the volume of the solution from milliliters to liters. Since you have 375 mL of solution:
Volume in liters = 375 mL / 1000 mL/L
Now, you can calculate the molarity:
M = Moles of NaCl / Volume in liters
With the calculated moles of NaCl and the volume in liters, you can determine the molarity of the NaCl solution.