If we have 22 molecules of sodium sulfate in water, how many sodium ions will be observed in solution?

Hi there!

Sodium Sulfate (Na₂SO₄) when dissolved in water, follows the following dissociation reaction:

Na₂SO₄ (s) ⇄ 2Na⁺ (aq) + (SO₄) ⁻² (aq)

So, if you have n molecules of sodium sulfate in water, you will observe 2 times this amount of sodium ions in solution. In this case, you have 22 molecules of sodium sulfate, so you will observe 44 sodium ions in solution.