A) 1.66
B) 12.35
C) 7
D) 14
Correct Answer: B
Solution :
\[{{K}_{sp}}=5.5\times {{10}^{-6}}\] \[Ca{{(OH)}_{2}}C{{a}^{2+}}+2O{{H}^{-}}\] \[\therefore \] \[{{K}_{sp}}=[C{{a}^{2+}}]{{[O{{H}^{-}}]}^{2}}=5.5\times {{10}^{-6}}\] \[\Rightarrow \] \[4{{s}^{3}}=5.5\times {{10}^{-6}}\] \[\Rightarrow \] \[s=0.0111\] \[\therefore \] \[[O{{H}^{-}}]=2s=0.0111\times 2=0.0222\] \[pOH=1.65\] \[pH=14-1.65=12.35\]You need to login to perform this action.
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