FI DE LUCRU

FI DE LUCRU

REACII DE COMBINARE. REACII DE DESCOMPUNERE

1. Egaleaz ecuaiile reaciilor chimice de mai jos i precizeaz tipul fiecrei reacii:

Mg + O2 MgONH3 + HCl NH4Cl

HgO Hg + O2

Al + S Al2S3CaO + H2O Ca(OH)2H2O H2 + O2

CuCO3 CuO + CO2

KClO3 KCl + O2

Na2O + H2O NaOHN2 + H2 NH3 2. Completeaz ecuaiile reaciilor urmtoare, stabilete coeficienii i precizeaz tipul fiecrei reacii :

Zn + O2 ..

.. + HCl

H2CO3 .. + H2OFe + FeCl3CH4 C +

3. Identific substanele a, b, c, d din schema de reacii de mai jos, stabilete coeficienii i precizeaz tipul fiecrei reacii:CaCO3 a + b

a + H2O Ca(OH)2b + H2O c

K2O + H2O d

b + d KHCO3 (carbonat acid de potasiu) HCO3 - ion carbonat acid4. n schema de mai jos apar ecuaiile unor reacii de combinare. Identific substanele a, b, c, d, e i stabilete coeficienii:

Ca + O2 a

H2 + O2 b

a + b c

b + CO2 d

NH3 + d e_1364662168.unknown

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