1. Determine the molar mass of NaCl:
* Na (sodium) has a molar mass of 22.99 g/mol
* Cl (chlorine) has a molar mass of 35.45 g/mol
* Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol
2. Calculate the moles of NaCl needed:
* Molarity (M) = moles of solute / liters of solution
* 3.5 M = moles of NaCl / 1.0 L
* moles of NaCl = 3.5 mol/L * 1.0 L = 3.5 moles
3. Calculate the grams of NaCl needed:
* grams of NaCl = moles of NaCl * molar mass of NaCl
* grams of NaCl = 3.5 moles * 58.44 g/mol = 204.54 g
Therefore, you need approximately 204.54 grams of sodium chloride to make a 1.0 L solution with a concentration of 3.5 M.
