Solid calcium hydroxide is dissolved in water until the pH of the solution is 10.88. The hydroxide ion concentration [OH-] of the solution is:

7.6 10-4 M
1.3 10-11 M
1.5 10-3 M
3.8 10-4 M

Ibelieve y y even though i've only taken chemistry for one year

Sorry i dont understand the question can you rephase it?

What are the choices?

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.