What is the pH of 14g of Ca(OH)2 dissolved to 350ml

Convert 14 g to moles. moles = grams/molar mass.

M Ca(OH)2 = moles/L soln.
(OH^-) = twice that of Ca(OH)2.
Then pOH = -log(OH^-) and convert pOH to pH by
pH + pOH = pKw = 14.
Solve for pH.