Final answer:
To solve for molar ionic strength, sum the concentrations of all ions.
Step-by-step explanation:
To solve for molar ionic strength, you need to sum the concentrations of all ions. This involves adding up the molar concentrations of each ion present in the solution.
For example, if you have a solution with Na+ and Cl- ions, you would add the molar concentration of Na+ to the molar concentration of Cl- to get the total molar ionic strength.