UBND HUYEN SON DOh*G PHONG crAo duc va oAo rSCI.. rlu THr cHgi\ Hec sxt{H.[r]
Trang 1UBND HUYEN SON DOh*G PHONG crAo duc va oAo rSCI rlu THr cHgi\ Hec sxt{H clol cAp HUvEN
NSwI HgC.20tt-2012 vtON THi : Ho,\ Hec 8
Thdi gian ldm bdi: l5i0 ph*r
Cfiu 1.(2 al6m) i t'igu1'Cl.lt cta nguy6n t6 M co t6ng sd har lrrcton, nfltron, electron le 60, trong d6 t6ng
T i,a, ,1ung dign nhiiu gap doi sd hat khong mangdign Xiic dinh s6 har m6i loai tron! nguydn
tu nguyen t0 l\1.
,.r 2 Cho gia tri tuygt d6i kh6i luqng nguyOn tir cira.:1 li.5,312.i0-:i g; cria Oxi ld
2,65bg.10-" g, er:a Cti Ia 10.624.10-" gt c"r1a.Ag li t7,gz8"l0-t'g Xac ctlnh tiiroi tuqne moi cira c6c
nguy0nt6trenuictt<.iroiluc.rn8ii,t,uangganicrialnguy0ntrrC:1.gg26.10:,.g-Cf,u 2.12 tli6m)
1 Tinh'sd plra, tri, s6 nguy€n tri cria nguyen t5 trong m6i luqng chAt sau:
2.a's - N*r-r cdch diAu ch6 khf H2 trong phong thi nghiQir Vi6t 2 phuong trinh h6a fiqc dC minh
hga.
- N.tu cdch thu khi H2? Giii thfch?
'r) Cho cung mQt
Llqtl'f:r{ ( a_gam) m5i kim"loai Zn, Fe, Al lin tuc,r vdo 3 6ng nghiQm
chria dung dich axit HCI ( l6y du) HEy so srtnh th6 tich khf H, thu duq:c tx.i 6ng nghrt,;trer:
{iiiri rhich'l C6c th6 tich khi do & ctrng di6u ki0n
Crir:.1.(7 di6m)
-. .ii iL -*" -ilj-rJl+*rri,-' e.+'qf; U-ri,- :.i",,
: C 2C'C dg tan r:iia mu,ii NaNOr la.98g, con G i0*11C ia IB* g.'I'irih kh6i tr.rryne mudi Nan*{i3 tach ra khi ha nhigt dO crja 140 g d'ine?ich l'"iariO3 bfro troi t*"-ir;,t0C ouOng ZO1E
Ciiu a.(2 rliCIm).
1' Dung 0,6 moi H2 kh& vta du -12 ;iiim m6t oxit kim loai c6 cdn.c thfic MzO,,, lAy to*n b0 luang kim ir.:4i thu duoc cho t6c dpng- hilt vdi lucrng ciu dung dich ,,xit I{Cl, t4o ru *u6i
2 MQt hqc sinh ldm thi nghigm nhrr mu cho m garn h6n hcm hai kim loTi Al yi Mg ( '
dqng bQt) '"'ao mQt c6c dpg dung dich axir 1i2Sr3., k:ing Sau khi bgt h;in hqp hai lo,3.i tan ii:.
"Oi ban diu vi cei
L2 lit H2 thoat ra ( 9 200C vd latm)- Ern hiy glup Unn OO
"i6t cAc lhnn rmg h6a hqrc x6y r:r trong thinghigm tr€d vd tfnir giri tri c{ra rn di:ri: ,tung.
Cir.r r.(2 tli6m)
I " iling phuc'ng phap hod hqc hf,I nh4n ':iilt 3 l,] m6t nllfrn, m6i lq d,;rn!i n:dt trorrg c6c ch6t bgt mau tring: Na2O: \4gO; pzO-s ViSt phucrng rrinh phf,n *ng
2' Hoi tan hoirn toit, 7,7 g h5n hqp g6rir Zn; Mg t ing a*ir HCI du'ihi thu dugc 3,36 lir khi
a.Tinh kh5i luo-ng m6i kim lo4i c6 rrong hdn hqp ban dAu.
b Tinh kfrdi luqng HCI than gi::i phan irng.
Ghi ckri: Hgc sinh chi du-o c sri dpng mdy tinh ca nhdn.
DE CHINH TH{TC
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