Barem de corectare pentru testul de chimie, pretestare 2011,
profilul real
Nr
Criteriile de apreciere
Specificarea
punctajului
acordat
Total
punctaj item
1 3HQWUXILHFDUHDOHJHUHFRUHFW 1p x 6 = 6p 6p 2
3HQWUXILHFDUHQRWDUHFRUHFWvQWDEHO. 1p x 9 = 9p 9p 3
3HQWUXFDOFXODUHDFRUHFWDJUDGHORUGHR[LGDUH
3HQWUXDOFWXLUHDFRUHFWDELODQ XOXLHOHFWURQLF
3HQWUXVWDELOLUHDFRUHFWDFRHILFLHQ LORU
3HQWUXLQGLFDUHDFRUHFWDR[LGDQWXOXLLUHGXFWRUXOXL
3HQWUXLQGLFDUHDFRUHFWDSURFHVHORUGHR[LGDUHLUHGXFHUH
3HQWUXVFULHUHDFRUHFWDFRHILFLHQ LORUvQHFXD LDUHDF LHL
1p 1p 2p 1p 1p 1p
7p
4 3HQWUXVFULHUHDFRUHFWDH[SUHVLHLSHQWUXFRQVWDQWDGHHFKLOLEUX
Pentru indiFDUHDFRUHFWDDF. iunulor Pentru un exemplu corect de
uilizare.
1p 1p x 3 = 3p
1p
5p
5 Pentru scrierea corHFWDFRQGL LLORUSUREOHPHL
3HQWUXVFULHUHDFRUHFWDHFXD LLORUUHDF LLORUFKLPLFHFHGHFXUJ
3HQWUXGHWHUPLQDUHDFRUHFWDFDQWLW LLGHKLGURJHQ
3HQWUXGHWHUPLQDUHDFRUHFWDFDQWLW LLGHDOXPLQLX 3HQWUXGHWHUPLQDUHDSU.
LLGHPDVDDOXPLQLXOXL Pentru GHWHUPLQDUHDSU. LLGHPDVDFXSUXOXL
3HQWUXQRWDUHDFRUHFWDXQLW LORUGHPVXU
3HQWUXUH]ROYDUHDSULQRULFHDOWPHWRGVHYDDFRUGDSXQFWDMXOPD[LPDO
1p 2p x 2= 4p 1p 1p 1p 1p 1p
10p
6 3HQWUXVFULHUHDFRUHFWDHFXD LLORUUHDF LLORUFKLPLFHFRQIRUPFHULQ
HORULQGLFDWH 2p x 4= 8p 8p 7
3HQWUXVFULHUHDFRUHFWDIRUPXOHORULDGHQXPLULORUVXEVWDQ HORU 1p x 9= 9p
9p 8 3HQWUXILHFDUHHFXD LHVFULVFRUHFW
Pentru indicarea unui domeniu de utilizare 2p x 3 = 6p 1p
7p
9 3HQWUXILHFDUHFRPSOHWDUHFRUHFW 1p x 7 = 7p 7 p 10 Pentru
analiza , LQRWDUHDFRUHFWDFRQGL. iilor problemei
3HQWUXGHWHUPLQDUHDFRUHFWDP&Q(C)
3HQWUXGHWHUPLQDUHDFRUHFWDP+Q(H) 3HQWUXGHWHUPLQDUHDFRUHFWDP2Q(O)
$OFWXLUea raportului , LUHDOL]DUHDOXLFRUHFWHWHUPLQDUHDformulei
brute
HWHUPLQDUHDPDVHLPRODUHGXSGHQVLWDWH Determinarea formulei
moleculare
3HQWUXQRWDUHDFRUHFWLXWLOL]DUHDFRUHFWDXQLW LORUGHPVXU Pentru
rezolvarea SULQRULFHDOWPHWRGVHYDDFRUGDSXQFWDMXOPD[LPDO
1p
1p
1p
1p
2p
1p
1p
1p
1p
10 p
11 3HQWUXDQDOL]DLQRWDUHDFRUHFWDFRQGL LLORUSUREOHPHL
6FULHUHDFRUHFWDHFua. iei de disociere
3HQWUXFDOFXODUHDFRUHFWDQ(HCl), C(HCl) Pentru calcularea
cRUHFWDFRQFHQWUD. iei ionilor de hidrogen (GXSHFXD.
LDGHGLVRFLHUHVDXGXSUDSRUWXOPRODU &DOFXODUHDFRUHFWDS+-ului , i
argumentarea ac. iunii solu. iei
3HQWUXQRWDUHDFRUHFWLXWLOL]DUHDFRUHFWDXQLW LORUGHPVXU Pentru
rezolvarea prin oricHDOWPHWRGVHYDDFRUGDSXQFWDMXOPD[LPDO
1 p
1p
2 p
1p
2p
1p
8 p
12 3HQWUXDOHJHUHDLVFULHUHDFRUHFWDUHDFWLYLORU
3HQWUXVFULHUHDFRUHFWDHFXD LLORUUHDk
LLORUGHLGHQWLILFDUH(0(,&(,5FRUHVSXQ]WRDUHLRQLORUDOHL: ( pentru
toate formulele FRUHFWHvQEM-1p;
SHQWUXVWDELOLUHDFRUHFWDWXWXURUFRHILFLHQ LORUvQ EM-1p; pentru toate
formulele FRUHFWHvQ EIC-1p; SHQWUXVWDELOLUHDFRUHFWDWXWXURUFRHILFLHQ
LORUvQ EIC-1p pentru toate formulele LFRHILFLHQ LvQ EIR-1p) Pentru
indicarea semnalului analitic
1 x 2 = 2 p
5p x 2 =
10p
1px2=2p
14 p
