Solid calcium hydroxide is dissolved in water until the pH of the solution is 10.39. The hydroxide ion concentration [OH^-] of the solution is A) M B) 3.61 M C) M D) M E) none of these

Question

Quizplus · Accepted Answer

The pH of the solution and the fact that solid calcium hydroxide was dissolved in water indicate that it is a basic solution. The pH of 10.39 corresponds to a hydroxide ion concentration of 10^-3.61 M. 
Therefore, the correct answer is choice C (11eab077_f809_7f25_beed_6369f87fddae_TB6421_11 M), which is closest to 10^-3.61 M.

Solid Calcium Hydroxide Is Dissolved in Water Until the PH