Which category of minerals is associated with maintaining water balance, osmotic equilibrium, acid-base balance and intracellular/extracellular differential?

The answer is electrolyte.

That is electrolyte is the type of minerals that is associated with maintaining water balance, osmotic equilibrium, acid-base balance and intracellular/extracellular differential.

Sodium, potassium and chlorides are the macrominerals that are known as the electrolytes, that are very important for the function says maintaining water balance, osmotic equilibrium, acid-base balance and intracellular/extracellular differential.