Đề thi HSG hóa tỉnh LA 2011

sd cIAo DVC vA DAo rAo LOI\G AN C TH ri rru cHqN Hec srNH cr6l Lop q cAp riNH wION THr: n6l Hqc NGAY THI: 071 41 20ll fHOl GIAN:150 pHi;r fthhng rc tnn giun phdt ttL) Ciu 1: (2 di6m) ut 4 V , Z theo thri tg ld ba nguy0n t6 lien ti6p trong bing tuAn hoirn. T6ng sO proton cita X, Y , Z Id2I.Xbc dinhX, Y,Z(px<pv <pz). b/ Hqp chdt e duoc t4o boi hai nguy6n t6 M ve Z co cdngthucMzZt, trong A t6ng s6 hqtliL236. Trong h4t nh6n M c6 n -p:4, cdn trong h4t nh6n Z ca n' : p'. Xdc dinhMzZt. CAq 2: (6 diem) 2.1) ViCt phuong trinh h6a hgc thgc hiQn so d0 chuydn h6a sau: A *o, >g +ddNaoH,g +ddNaoH,p +ddHcl ,B *o, >E **tro >F *Cu >B Bitlt A la thenh phAn chinh cua qu{ng pirit sdt. 2.2)Thdm dan 100 ml dung dich NaOH vio 25 ml dung dich AlClr vira du thu duoc lugng k6t tria cyc d4i I,872 gam. alTinh n6ng dQ mol cua m6i dung dich ban tldu. b/ NOu th6m V ml dung dfch NaOH trOn vdo 25 mldung dich AlCl3 tr€n. Sau phAn img thu dugc lugng k6t ttra bang 9110 lugng k0t tria cgc dai. Tinh V. clT.3='Jl dicm) .A r i.i , .^ ., \ 3.1) Hai nguyOn t0 R vd R' ddu o th6 rdn trong di€u ki6n thucrng,12 gayt R c6 s6 mol nhi6u hcm s0 mol cua 6,4 gam R' le 0,3 mol. Bi0t kh6i luqng mol ctra R nh6 hon kh6i lugng mol cria R' li 8. a/ Hdy cho bi6t tOn cua R vi R'. b/ Tinh ttrOi luqng ch6t rin thu dugc khi nung n6ng h6n hqp R vi R'(trong m6i trudng kh6ng c6 kh6ng khi). 3.2) Nung m (g) hOn hqp g6m KMnOa vd KC1O3 co cung sO mol, ta thu duoc chAt ri.n vi khi 02. TrQn oxi thu dugc o trOn vcri kh6ng khi trong binh kin thu dugc hdn hqp khi. Cho ti6p v.do binh 19,2 garn cacbon rOi AOt chdy htit thu dugc h5n hcr-p khi g6m hai khi trong d6 c6 COz chi6m 40% v0 thO tich. Tinh m. Bi6t kh6ng khf chria 20oA O2vi 80% Nz vd th,3 tich, th6 tich c6c khi do o dktc. Ciu 4: (3 di6m) MQt h6n hqp X.gdm C2Ya, Hz vir chAt xric t6c Ni nung n6ng, sau mQt thdi gian thi thu dugc h6n hqp khi Y. BiCt rdng ti khdi hoi cira X so vdi khi hiclro 1d7,5 vd ti khdi hcvi cua Y so v6i khi hidro ld 12. CLc th0 tfch khi do <r cirng di6u kiQn nhiet d0 vir 6p su6t, al Titlhthenh phin phAn trf,m theo th€ tich cic khi c6 trong h6n hq'p X, Y. b/ Trinh bdy phuong phep h6a hgc chung minh sU c6 m{t ttmg khi c6 trong h6n hqp Y. Cffu 5: (a didm) Dung dich axit axetic ( dung dich A) c6 kh6i luqng riOng ld 1,0 g/ml. - Cho Vml dung dtch A vdo 26,5 gam dung dich Na2CO320oh, tAo thdnh 0,672lit khi (dktc) vd dung dich B. Cho B vio c6c chria 25,9 gam dung dich Ca(OH)z l0o%, thu duoc 2 gam k6t ttra vi dung dich C. - N6u trung hda V ml dung dich A bang NaOH vira du thu dugc 37,48 gam nu6c. a/ Tinh n6ng dQ mol cria dung dich A. b/ Tinh n6ng dQ phdn trdm c6c ch6t c6 trong dung dich C. HET Chti f: Hoc sinh duqc ph6p su dgng bing tuAn hoirn c6c nguy6n td h6a hgc. . vA DAo rAo LOIG AN C TH ri rru cHqN Hec srNH cr6l Lop q cAp riNH wION THr: n6l Hqc NGAY THI: 071 41 20ll fHOl GIAN:150 pHi;r fthhng rc tnn giun phdt ttL) Ciu 1: (2 di6m) ut. sau: A *o, >g +ddNaoH,g +ddNaoH,p +ddHcl ,B *o, >E **tro >F *Cu >B Bitlt A la thenh phAn chinh cua qu{ng pirit sdt. 2.2)Thdm dan 100 ml dung dich NaOH vio 25 ml dung. (3 di6m) MQt h6n hqp X.gdm C2Ya, Hz vir chAt xric t6c Ni nung n6ng, sau mQt thdi gian thi thu dugc h6n hqp khi Y. BiCt rdng ti khdi hoi cira X so vdi khi hiclro 1d7,5 vd ti