How many grams of NaCl (molar mass = 58.44 g/mol) are needed to prepare 1.00 mol of Na+ ions?

• A. 116.88 g
• B. 29.22 g
• C. 1.00 g
• D. 58.44 g

Answer: (D)

Verified step by step guidance

1. Identify the chemical formula of the compound: NaCl dissociates into Na+ and Cl- ions in solution.
2. Recognize that 1 mole of NaCl produces 1 mole of Na+ ions because the ratio of Na+ to NaCl is 1:1.
3. Since you need 1.00 mole of Na+ ions, you also need 1.00 mole of NaCl to provide that amount of Na+ ions.
4. Use the molar mass of NaCl (58.44 g/mol) to convert moles of NaCl to grams using the formula: \(\text{mass} = \text{moles} \times \text{molar mass}\).
5. Calculate the mass of NaCl required by multiplying 1.00 mole by 58.44 g/mol, which gives the grams of NaCl needed to supply 1.00 mole of Na+ ions.