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What is the pH of saturated solutoin of `Cu(OH)_(2)` ? `(Ksp=3.2xx10^(-20))`A. 6.4B. 7.6C. 7.3D. 7.9 |
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Answer» Correct Answer - B `{:(Cu(OH)_(2),hArr,Cu^(+2)+,2OH,),(,,s,2s,),(Ksp=4S^(3),,,,):}` `[{:(2S=[OH^(-)]),(pOH=log[OH^(-)]):}` `4S^(3)=32xx10^(-21)` `S^(3)=8xx10^(-21)` ` S=2xx10^(-7)` `[OH]=25=4xx10^(-7)` `pOH=7-log_(4)` pOH=7-0.6=6.4 pH14-6.4=7.6 |
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