What is the pH of 4% (w/v) solution of Ca(OH)2? Assume that Ca(OH)2 is 100% dissociated.
A 4% (w/v) solution means that there are 4 g of solute for every 100 mL of solution, or 4 g Ca(OH)2 in 100 ...
This solution converts the percentage composition of Ca(OH)2 solution in to g/litre. From there, we convert into moles by dividing by the molar mass. We use pOH = -log[OH-] to find the solution.