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:

pH of a saturated solution of CaOH2 is 9 . The solubility product Ksp of CaOH2 is:
  1. 0.5×10-15
  2. 0.25×10-10
  3. 0.125×10-15
  4. 0.5×10-10

Solution

CaOH2⇌Ca+2S+2OH-2S
pH of saturated solution =9
pH=9, H+=10-9
Hence OH-=10-1410-9=10-5
2s=10-5,  s=10-52
ksp for CaOH2⇒4s3
⇒4×10-523
=10-152=0.5×10-15

Asked in: NEET 2019 (All India)

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