Reactions Flashcards
1
Q
Color Change
A
2Cu(NO3)2 → 2CuO + 4NO2 + O2
Blue Black
2Pb(NO3)2 → 2PbO + 4NO2 + O2
White Yellow
2
Q
Evolution of Gas
A
Na2SO3 + H2SO4 → Na2SO4 + H2O + SO2 [gas]
CaCO3 + 2HCl → CaCl2 + H2O + CO2 [gas]
2NH4Cl + Ca(OH)2 → CaCl2 + 2H2O + 2NH3 [gas]
3
Q
Formation of Precipitate
A
Pb(NO3)2 + 2NaCl → 2NaNO3 + PbCl2 [white precipitate]
CuSO4 + 2NaOH → Na2SO4 + Cu(OH)2 [pale blue precipitate]
4
Q
Heat Change
A
N2 + 3H2 ⇄ 2NH3 + [heat]
N2 + O2 + [heat] ⇄ 2NO
5
Q
Combination
A
2H2 + O2 → 2H2O
6
Q
Decomposition
A
CaCO3 → CaO + CO2
7
Q
Displacement
A
Mg + CuSO4 → Cu + MgSO4
