A) \[3.52\times {{10}^{-3}}\]
B) \[6.75\times {{10}^{-4}}\]
C) \[5.38\times {{10}^{-2}}\]
D) \[1.74\times {{10}^{-5}}\]
Correct Answer: B
Solution :
[b] \[{{K}_{w}}={{K}_{a}}\times {{K}_{b}}\] \[{{K}_{b}}={{10}^{-10.83}}=1.48\times {{10}^{-11}}\] \[\therefore {{K}_{a}}=\frac{{{K}_{w}}}{{{K}_{b}}}=\frac{{{10}^{-14}}}{1.48\times {{10}^{-11}}}=6.75\times {{10}^{-4}}\]You need to login to perform this action.
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