Answer to Question #51828 in Physical Chemistry for Souvik

Question

The pH of Ca(OH)2 solution is 12.Find the number of milliomoles of Ca(OH)2 present in its 100ml solution.

Answer 1

The concentration of Ca(OH)2 will be equal to concentration of OH- in the solution.
pOH of the solution is 14-12 = 2.
[OH-] = 10^-2
The number of moles of Ca(OH)2 present in its 100ml solution is: 10^-2*0.1 = 10^-3 moles = 1mole.