A) 12
B) 10
C) 8
D) 6
Correct Answer: A
Solution :
M.eq. of 0.10 \[M\,\,HCl=\frac{0.10}{1000}\times 40=0.004M\] M.eq. of 0.45 \[M\,\,NaOH=\frac{0.45\times 10}{1000}=0.0045M\] Now left \[[O{{H}^{-}}]=0.0045-0.004\]\[=5\times {{10}^{-4}}\]M Total volume = 50 ml. \[[O{{H}^{-}}]=\frac{5\times {{10}^{-4}}}{50}\times 1000\]; \[[O{{H}^{-}}]=1\times {{10}^{-2}}\] pOH = 2 ; pH = 14 ? pOH = 12.You need to login to perform this action.
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