8/18/2019 Olimpiada Judeteana de Chimie 2006- subiecte, clasa a X-a

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Ministerul Educaţiei şi CercetăriiDirecţia Generală Învăţământ Preuniversitar

OLIMPIADA DE CHIMIE – etaa !udeţeană

"# $e%ruarie "&&'

(arem de re)*lvare – clasa a + a

,u%iectul I------------------------------------------------------------------------------------------------------------------------------------------------.& uncte

 Nr. item a b c/ F A A" A A A. A A F0 F A F# F A F' F A F1 F F A2 F A F3 A A F

/& F F F

,u%iectul II --------------------------------------------------------------------------------------------------------------------------------------------- .& uncteEcuaţia reacţiei de ardere..............................................................................................................................." m apă = 14,4 g.................................................................................................................................................." Formula moleculară: C7H8.............................................................................................................................#

 Nr. moli r ! = ","#, deci A e$te u% compu$ ciclic cu # legături &.................................................................. A = 'i%ilciclope%tadie%a................................................................................................# = tolue%....................................................................................................................................................... C(H) * CH# + Cl!  lu%i%ă       C(H) * CH!Cl + HCl..................................................................................."   C -

CH!Cl   / 0!

0    2- E- F- .......................2  ,u%iectul III4444444444444444444444444444------------------------------ .& uncte

A- -------------------------------------------------------------------------------------------------------------------------------------------------------------- /' unctea- C(H( + HN# → C(H)3N! + H! ..............................................................................................................1 pm HN# = 1!,( + !)! = !(4,( g .........................................................................................................................# pm am. %itra%t = 8!(,87) g....................................................................................................................................! pm H! = ((,1) g............................................... ..................................................................................................! pm H!54 = 46(,1!) g...........................................................................................................................................! pm H! di% reacţie = 7! g.....................................................................................................................................1 pm am. reidual = (4(,87 g................................................................................................................................... ! pCompoiţia i%ală a ame$tecului reidual: 7(,(69 H!54 , 1,649 HN# , !1,#79 H!.....................................! p

 b- aportul H!54 : H! = ",()6 ........................................................................................................................1 p

#AlCl

!HCl−      →   !H−

    →

!

# ;.<

H .

+

−      →

8/18/2019 Olimpiada Judeteana de Chimie 2006- subiecte, clasa a X-a

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(- --------------------------------------------------------------------------------------------------------------------------------------------------------------- /0 unctea- C4H8 ..................................................................................................................................................................4 p! = 1" cm# >?%4 !? ⇒  %r. moli >?%4 = ","! moli ..................................................................................! pCH! = CH * CH! * CH# + )[]  → C! + H! + CH# * CH! * CH...............................................................4 p

  b- 13bute%ă p..1 = 3(,)°C ...........................................................................................................4 p

!3bute%ă trans  p..! = 1°C!3bute%ă cis  p..# = #,7°Cciclobuta% p..4 = 1#°C