What is the concentration of sodium ions in a 0.300 M Na2CO3 solution?

• A. 0.300 M
• B. 0.600 M
• C. 0.900 M
• D. 0.150 M

Answer: (B)

Verified step by step guidance

1. Identify the chemical formula of the compound: sodium carbonate is Na\_2CO\_3, which means each formula unit contains 2 sodium ions (Na\^+).
2. Understand that the concentration of the solution (0.300 M) refers to the concentration of Na\_2CO\_3 formula units in the solution.
3. Since each formula unit of Na\_2CO\_3 dissociates into 2 Na\^+ ions, multiply the molarity of Na\_2CO\_3 by 2 to find the concentration of sodium ions.
4. Write the expression for sodium ion concentration: \(\text{[Na\^+]} = 2 \times 0.300\ \text{M}\).
5. Calculate the product to find the sodium ion concentration, which will give you the final answer.