Question

pH of a saturated solution of C a ( O H ) 2 is 9. the solubility product ( K s p ) of C a ( O H ) 2 is A. 0.5 × 10 − 10 B. 0.5 × 10 − 15 C. 0.25 × 10 − 10 D. 0.125 × 10 − 15 Select the correct answer from above options

Answer 1

Correct Answer - B pH of saturated solution of C a ( O H ) 2 = 9 C p O H p of saturated of C a ( O H ) 2 = 5 C O H − = 10 − 5 O C a ( O H ) 2 ⇔ × 1 / 2 10 − 5 C a 2 + S + 2 O H − 2 S 10 − 5 C solubility ( s ) = 1 / 2 × 2 10 − 5 ( K a p = [ B a 2 + ] [ O H − ] 2 K [ 1 / 2 × 10 − 8 ] [ 10 − 5 ] 2 = 0.5 × 10 − 15 [