Physical Properties:
Reaction with Metals:
Heavy water react slowly with alkali metals and alkaline earth metals to form heavy hydrogen. ( D2 ).
- Heavy water is colorless, odourless and tasteless mobile liquid..
- Higher viscosity of heavy water is responsible for lower solubility of ionic solids like NaCl and smaller mobility ions.
Reaction with Metals:
Heavy water react slowly with alkali metals and alkaline earth metals to form heavy hydrogen. ( D2 ).
D2O
+ 2Na → 2NaOD + D2
(Sodium deuteroxide)
D2O
+ Ca → Ca(OD)2 + D2
(Calcium deuteroxide)
Reaction with Metal oxides:
Heavy water react slowly with metal oxide to form heavy alkalies. ( deuteroxides)
Na2O
+ D2O →
2NaOD
CaO + D2O →
Ca(OD)2
Reaction with Non-metallic oxides:
Heavy water react with non-metallic oxides to form deutero acid.
D2O + N2O5 →
2DNO3
(Deuteronitric
acid)
D2O
+ SO3 → D2SO4
(Deutero sulphuric acid)
3D2O
+ P2O5 → 2D3PO4
(Deuterophosphoric
acid)
Electrolysis :
On electrolysis, heavy water containing dissolved Na2Co3 decomposes into deuterium and oxygen which are liberated at the cathode and anode respectively.
2D2O → 2D2 + O2
(cathode) (anode)
Deutero hydrates:
With salt and other compounds they form deuterates.
CuSO4.5D2O, Na2SO4.10D2O,
NiCl2.6D2O.
Exchange Reactions:
When compounds containing hydrogen are treated with D2O , hydrogen is exchanged by deuterium partially or completely.
NaOH + D2O →
NaOD + HDO
NH4Cl
+ 4D2O →
ND4Cl + 4HDO
HCl + D2O
→
DCl + 4HDO
Raction with Carbide and Nitride:
CaC2 + 2D2O →
Ca(OD)2 + DC = CD
(Deuteroacetylene)
Mg3N2
+ 6D2O →
3Mg(OD)2 + 2ND3
(Magnesium nitride) (Deuterommonia)
Reaction with Phosphides: Ca3P2 +
6D2O → 3Ca(OD)2 +
2PD3
Reaction with Phosphides:
(Calcium phosphide) (Deuterophosphine)
Na3As
+ 3D2O →
NaOD + AsD3
(Sodium arsenide) (Deuteroarsene)
Biological Properties:
- The tobacco seeds do not grow in heavy water.
- Pure heavy water kill small fish, tadpoles and mice when fed upon it.
- Heavy water, retards the growth of living organisms like plants and animals.
No comments:
Post a Comment