Răspunsuri

2014-05-31T22:57:18+03:00
R. de combinare:
Cu+S=CuS
4Al+2O²=2Al²O³
Na+S=Na²S
Ca+Cl=CaCl
2Ca + O²=2CaO
2H²+O²=2H²O
H²+S=H²S
H²+F²=2HF
2Mg+O²=2MgO
Ca+S=CaS

R. de descompunere:
CaCO³-->(t°C) CaO + CO²
2Cu(OH)²-->(t°C) 2Cu↓+4H²O
H²O²-->(t°C+MnO) H²O + ½O²↑
HgO-->(lumină) Hg↓+ ½O²
KClO³-->(MnO²) KCl+ 3/2O²↑
MgF²=Mg+ F²
MgCl²=Mg+Cl²
MgS=Mg+S
MgO=Mg + ½O²
2CuO=2Cu+O²

R. de substituție:
CuSO⁴+Fe= Cu↓ + FeSO⁴
Zn+ 2HCl= H²↑+ZnCl²
CuSO⁴+Mg= MgSO⁴+Cu↓
2Al+Fe²O³= 2Fe↓+Al²O³
CuO+H²=Cu↓+H²O
Zn+H²SO⁴= ZnSO⁴+ H²↑
C+H²O= CO + H² (gaz de apă)
C+Co²=2CO
C+2ZnO=CO²+2Zn↓
NO+½O²=NO²

R. de dublă înlocuire:
H²SO⁴+BaO= BaSO⁴+H²O
Cu(OH)²+H²SO⁴=CuSO⁴+ 2H²O
CuSO⁴+2NaOH=Cu(OH)²+ Na²SO⁴
CuSO⁴+BaCl=BaSO⁴+CuCl²
2NaCl+H²SO⁴=2HCl+ Na²SO⁴
2NaCl+Ag²O=2AgCl+Na²O
HCl+Na²SO⁴=2NaCl+ H²SO⁴
3Ca(OH)²2FeCl³=3CaCl²+2Fe(OH)³
CuSO⁴+KOH=Cu(OH)²+K²SO⁴
AlCl³+3NaOH=Al(OH)³+3NaCl

Multumesc . Si poti sa le scrii si denumirea te rog .