1. Convert grams of NaCl to moles:
* Molar mass of NaCl = 58.44 g/mol
* Moles of NaCl = (1.5 g) / (58.44 g/mol) = 0.0257 mol
2. Use the molarity to calculate the volume:
* Molarity (M) = moles of solute / volume of solution (in liters)
* Volume (L) = moles of solute / Molarity
* Volume (L) = (0.0257 mol) / (0.420 mol/L) = 0.0612 L
3. Convert liters to milliliters:
* Volume (mL) = 0.0612 L * 1000 mL/L = 61.2 mL
Therefore, you need to measure out 61.2 mL of the 0.420 M NaCl solution to obtain 1.5 g of NaCl.
