What is the molar concentration of sodium ions (Na^+) in a 0.350 M Na_3PO_4 solution?

• A. 0.700 M
• B. 0.117 M
• C. 0.350 M
• D. 1.05 M

Answer: (D)

Verified step by step guidance

1. Identify the chemical formula of the compound: sodium phosphate is Na\_3PO\_4, which means each formula unit contains 3 sodium ions (Na\^+).
2. Understand that the molar concentration of Na\_3PO\_4 given is 0.350 M, meaning there are 0.350 moles of Na\_3PO\_4 per liter of solution.
3. Since each mole of Na\_3PO\_4 produces 3 moles of Na\^+, multiply the molarity of Na\_3PO\_4 by 3 to find the molarity of Na\^+ ions.
4. Write the expression for the concentration of sodium ions: \(\text{[Na\^+]} = 3 \times 0.350\ \text{M}\).
5. Calculate the product to find the molar concentration of sodium ions in the solution.