What is the concentration of sodium ions in 0.165 M Na₂CO₃?

Answer 1

Na₂CO₃ dissociates in solution to give 2Na⁺ + CO₃^2-

0.165 M Na₂CO₃ ==> 2x0.165 M Na⁺ + 0.165 M CO₃^2-

Concentration of Na+ ions = 0.330 M Na⁺