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lucrare practica 8TRANSCRIPT
Data__________ Nota ___________ Am fcut cunotin de tehnica securitii i m oblig s o respect .
Lucrarea practic 3 clasa a 9-a N. P. Elevului ____________________________
Rezolvarea problemelor experimentale la tema Nemetalele Varianta I _____________________________
Nr. i denumirea problemeiRezolvarea ObservaiiconcluziiEcuaiile reaciilor chimice
Problema 1
Determin c n soluia de acid clorhidric exist ioni de hidrogen i ioni de clorur Se d :
- soluie : HCl ,AgNO3
-efectuiez experimenul
-alctuiesc ecuaiile reaciilor______________________
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Problema 2
Demonstreaz c n ebrubetele nr. 1 ,2 i 3 se conine substanele HCl, NaoH, NaClSe d :
-soluiile : NaOH , HCl,NaCl, FeCl3, AgNO3, metiloranj- inel de nicron,, spirtier-efectuiez experimenul
Nr. eprubetei
reactivmetiloranjNaOH
NaClHCl
NaOH nr._____
HCl nr._____
NaClnr._____
Problema 3
Cum pot fi nlturate , din clorura de sodiu, impuritile de carbonat de sodiuSe d :
-substanele : NaCl,Na2CO3 hrtie de filtru-separar substanele-efectuiez experimenul
-alctuiesc ecuaiile reaciilor
____________________________________________________________________________________________________________________________________
Problema 4
Obinei prin 3 metode clorur de sodiu i separai-o din amestecSe d :
-soluiile________________ ______________________________________________-obin substanele NaCl -efectuiez experimenul
-alctuiesc ecuaiile reaciilorReactivul 1Reactivul 2ProdusulNaClNaClNaCl
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Problema 5
Efectuiaz transformarea pe cale experimentalCa(OH)2CaCO3CaCl2AgCl
Se d :
-soluiile__________________
____________________________________________________-efectuiez experimenul
-alctuiesc ecuaiile reaciilor______________________
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Data__________ Nota ___________ Am fcut cunotin de tehnica securitii i m oblig s o respect .
Lucrarea practic 3 clasa a 9-a N. P. Elevului ____________________________
Rezolvarea problemelor experimentale la tema Nemetalele Varianta II _____________________________
Nr. i denumirea problemeiRezolvarea ObservaiiconcluziiEcuaiile reaciilor chimice
Problema 1
Determin c n soluia de clorura de natriu exist ioni de natriu i ioni de clorSe d :
- 2 eprubete cu soluie : NaCl , AgNO3- inel de nicron,, spirtier
-efectuiez experimenul
-alctuiesc ecuaiile reaciilor______________________
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Problema2
Demonstreaz c n ebrubetele nr. 1 ,2 i 3 se conine substanele HCl, NaoH, NaClSe d :
-soluiile : NaOH , HCl,NaCl, FeCl3, AgNO3, metiloranj- inel de nicron,, spirtier-efectuiez experimenul
Nr. eprubetei
reactivmetiloranj
NaOH
NaClHCl
NaOH nr._____
HCl nr._____
NaClnr._____
Problema3Cum pot fi nlturate , din clorura de sodiu, impuritile de carbonat de sodiu Se d :
-substanele : NaCl,Na2CO3 hrtie de filtru
-separar substanele-efectuiez experimenul
-alctuiesc ecuaiile reaciilor
_________________________________________________________________________________________________________________________________________________________________
Problema 4
Obinei prin 3 metode carbonat de calciu i separai-o din amestecSe d :
-soluiile________________
______________________________________________-obin substanele NaCl
-efectuiez experimenul
-alctuiesc ecuaiile reaciilorReactivul 1Reactivul 2Produsul
CaCO3CaCO3CaCO3
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Problema 5
Efectuiaz transformarea pe cale experimental
Ca(OH)2CaCO3CaCl2
Se d :
soluiile_________________
_____________________________________________________________________
-efectuiez experimenul
-alctuiesc ecuaiile reaciilor______________________
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