K_(sp)for Ca(OH)_(2) is 5.5xx10^(-6). What is the maximum pH that can be attained in a sewage tank treated with slaked lime ?

K_(sp)for Ca(OH)_(2) is 5.5xx10^(-6). What is the maximum pH that can

1.	K_(sp)for Ca(OH)_(2) is 5.5xx10^(-6). What is the maximum pH that can be attained in a sewage tank treated with slaked lime ?
Answer» `9.35` `10.35` `11.35` `12.35` SOLUTION :`CA(OH)_(2)hArrCa^(2+) + 2 OH^(-)` `K_(SP)=[Ca^(2+)][OH^(-)]^(2)=5.5xx10^(-6)` (Given) `:.s(2s)^(2)=5.5xx10^(-6)` or `4s^(3)=5.5xx10^(-6) ` or `s^(3)=1.375xx10^(-6)` `:. S=1.11xx10^(-2)M` `:. [OH^(-)]=2s=2.22xx10^(-2)M` `:.pOH=-log(2.22xx10^(-2))=2-0.3464=1.65` `:.pH=14-1.65=12.35`