How many sodium ions are present in 30.0 mL of 0.600 M Na₂CO₃ solution? A) 3.25 × 10²² ions B) 2.17 × 10²² ions C) 1.08 × 10²² ions D) 5.42 × 10²² ions E) 3.61 × 10²¹ ions

Question

Quizplus · Accepted Answer

To find the number of sodium ions, first calculate the moles of Na₂CO in 30.0 mL (0.030 L) of a 0.600 M solution using the formula moles = concentration × volume. This gives 0.600 mol/L × 0.030 L = 0.018 mol. Since each formula unit of Na₂CO contains one sodium ion, there are also 0.018 mol of sodium ions. To find the number of ions, multiply the moles by Avogadro's number (6.022 × 10^23 ions/mol), resulting in 0.018 mol × 6.022 × 10^23 ions/mol = 1.08 × 10^22 ions, which matches choice B.

How Many Sodium Ions Are Present in 30