Question

I = ∑0.5MZ2 (or ∑0.5 x molarity x charge2
sodium (Na+)

Answers

GPT 3.5
I = ∑0.5 x molarity x charge^2 Na+

Where:
I = ionic strength
molarity = concentration of sodium ions in solution
charge = charge of sodium ions

Therefore, to calculate the ionic strength for a solution containing sodium ions (Na+), you would need to know the molarity (concentration) of sodium ions in the solution and the charge of sodium ions.