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Q.

Twenty milliliters of an aqueous solution of 0.10M butyric acid is shaken with 10ml ether. After the layers are separated , it is determined by the titration that 0.5 mmol butyric acid remains in the aqueous layer. The percent of acid extracted is           

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answer is 75.

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Detailed Solution

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volume of aq sol=20(v)
Volume  of ether=10(v)
Unextracted amount wn=0.5mm
0.1m=nv=n20 X1000 n=2mmoles
Extracted amount =2.05 
=1.5
% of entr 1.52 X100=75%

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