The scheme below summarises some reactions of sodium metal. [VISUAL] where *L* = [VISUAL] and THF = — Physical Chemistry Chemistry Question
Reactions of sodium
The scheme below summarises some reactions of sodium metal.
[VISUAL]
where *L* = [VISUAL] and THF = [VISUAL]
Compound A is white, crystalline solids. Identify it and discuss the bonding in the anion. How do the metals Li and K react with excess O2?
Model Answer
A = Na2O2
2 Li + O2 → 2 Li2O
K + O2 → KO2
Compounds B and C are both deeply coloured solids. Identify each of them and briefly discuss the driving force for their formation. Note that the EtNH2 acts only as a solvent for these reactions.
Model Answer
B = NaL+ e-
C = NaL+ Na-
Solutions of D and E are deep green and blue, respectively. What are the species present in these solutions?
Model Answer
D = naphthalene anion radical
E = Na+ e- (NH3)
Compound G is a white crystalline ionic solid, while F is a colourless, highly flammable gas that does not condense in liquid NH3. Identify F and G.
Model Answer
F = H2
G = NaNH2
Compound H is a white, ionic solid. One mole of the gas F is formed for each mole of H that is formed. Identify compound H.
Model Answer
H = C2HNa