Match each sodium salt solution with its corresponding number of sodium ion moles.
-100 mL of 0.2 M sodium nitrate solution

Question

Quizplus · Accepted Answer

0.2 M means there are 0.2 moles of NaNO3 per liter of solution. Since we have 100 mL of solution (0.1 L), the number of moles of NaNO3 is:
0.2 moles/L x 0.1 L = 0.02 moles
Each mole of NaNO3 has one mole of Na+ ions, so the number of moles of Na+ ions in the solution is also 0.02 moles. Therefore, the best choice is B.

Match Each Sodium Salt Solution with Its Corresponding Number of Sodium