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n-Butane (C_(4)H_(10)) is produced by monobromination of C_(2)H_(5) followed by Wurtz reaction. Calculate the volume of ethane al S.T.P. required to produce 55gin of n-butane. The bromination takes place with 90% yield and the Wurtz reaction with 85% yield |
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Answer» 27.75 litres `2C_(2)H_(5)Br+2Na to C_(4)H_(10)+2NaBr` (wurtz reaction) …............(2) Wurtzreaction with 85% yeild As PER equation …...(2) 2 moles of `C_(2)H_(5)Br …................ 58g "of" C_(4)H_(10) , "x moles" xx (85)/(100) ........ 55 g "of" C_(4)H_(10)` `implies (2 xx 55)/(85 xx 58) xx 100=2.23` moles of `C_(2)H_(5)Br` As per equation .........(1) (Bromination with 90%) `2 xx 22.4` litres of `C_(2)H_(6)` ......... 2 moles of `C_(2)H_(5)Br` `x xx (90)/(100)` litres of `C_(2)H_(6)` ....... 2.23 moles of `C_(2)H_(5)Br implies (2 xx 22.4 xx 2.23 xx 100)/(2 xx 90)=55.5` litres |
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