What is the molarity of an 18 L solution containing 64 grams of sodium chloride (NaCl) dissolved in it? (Molar mass of NaCl = 58.44 g/mol)

• A. 0.089 M
• B. 0.051 M
• C. 0.061 M
• D. 0.062 M

Answer: (C)

Verified step by step guidance

1. Identify the given information: volume of solution = 18 L, mass of NaCl = 64 g, and molar mass of NaCl = 58.44 g/mol.
2. Calculate the number of moles of NaCl using the formula: \(\text{moles} = \frac{\text{mass}}{\text{molar mass}} = \frac{64}{58.44}\).
3. Recall the definition of molarity: \(M = \frac{\text{moles of solute}}{\text{liters of solution}}\).
4. Substitute the values into the molarity formula: \(M = \frac{\text{moles of NaCl}}{18}\).
5. Perform the division to find the molarity of the NaCl solution.