How many grams of NaCl are required to prepare 50 mL of a 1 M NaCl solution?

• A. 5.85 g
• B. 1.00 g
• C. 0.50 g
• D. 2.93 g

Answer: (D)

Verified step by step guidance

1. Identify the formula to calculate the mass of solute needed: \(\text{mass} = \text{molarity} \times \text{volume} \times \text{molar mass}\).
2. Convert the volume from milliliters to liters because molarity is in moles per liter: \$50\ \text{mL} = 0.050\ \text{L}$.
3. Use the given molarity of the NaCl solution, which is \$1\ \text{M}$, meaning 1 mole of NaCl per liter of solution.
4. Find the molar mass of NaCl by adding the atomic masses of sodium (Na) and chlorine (Cl): \(\text{molar mass of NaCl} = 22.99 + 35.45\) grams per mole.
5. Calculate the mass of NaCl required by multiplying the molarity, volume in liters, and molar mass: \(\text{mass} = 1\ \text{mol/L} \times 0.050\ \text{L} \times (22.99 + 35.45)\ \text{g/mol}\).