We want to calculate the concentrations of all species in a 0.56 M Na₂SO₃ (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4 × 10⁻² and Ka₂ = 6.3 × 10⁻⁸. Let's start by first calculating the concentration of the spectator ion. Na⁺ = ?