I forget solubility, but I'm assuming that there's a chart for it, which is a constantthat you put in a formula to get the pH?

From my understanding we get pH when we know the concentration of OH or H ions in the solution.

So, the answer is that most likely half of the tablet won't dissolve, but is there a chemical formula for this in which I can relate the mass of Calcium Hydroxide and a volume of solution which is h2O to pH?

Also, I am trying to figure out the conjugate base and acid for this chemical formula. I'm confused because of the subscript 2 after (OH). I assume only 1 OH is removed, so that would be a conjugate acid of Ca(OH), but what would the conjugate base be? Since OH is removed, is it H3O2? I'm pretty sure I'm wrong.

This is the formula I have:

Ca(OH)2subscript + H2O -> conj. acid + conj. base