Input interpretation
![heavy water](../image_source/dc92e9c48bdf645014dfb8e39e6f73cd.png)
heavy water
Chemical names and formulas
![formula | D_2O name | heavy water alternate names | deuterium oxide | dideuterium oxide | heavy water-d2 | water-d2 mass fractions | O (oxygen) 0.799% | H (hydrogen) 0.201%](../image_source/f508be0c93e3a03085700cbe14a2d7e0.png)
formula | D_2O name | heavy water alternate names | deuterium oxide | dideuterium oxide | heavy water-d2 | water-d2 mass fractions | O (oxygen) 0.799% | H (hydrogen) 0.201%
Lewis structure
![Draw the Lewis structure of heavy water. Start by drawing the overall structure of the molecule: Count the total valence electrons of the hydrogen (n_H, val = 1) and oxygen (n_O, val = 6) atoms: 2 n_H, val + n_O, val = 8 Calculate the number of electrons needed to completely fill the valence shells for hydrogen (n_H, full = 2) and oxygen (n_O, full = 8): 2 n_H, full + n_O, full = 12 Subtracting these two numbers shows that 12 - 8 = 4 bonding electrons are needed. Each bond has two electrons, so the above diagram has all the necessary bonds. There are 2 bonds and hence 4 bonding electrons in the diagram. Lastly, fill in the remaining unbonded electrons on each atom. In total, there remain 8 - 4 = 4 electrons left to draw: Answer: | |](../image_source/1d6348aaa49375c95c4ff0fd22bbafd6.png)
Draw the Lewis structure of heavy water. Start by drawing the overall structure of the molecule: Count the total valence electrons of the hydrogen (n_H, val = 1) and oxygen (n_O, val = 6) atoms: 2 n_H, val + n_O, val = 8 Calculate the number of electrons needed to completely fill the valence shells for hydrogen (n_H, full = 2) and oxygen (n_O, full = 8): 2 n_H, full + n_O, full = 12 Subtracting these two numbers shows that 12 - 8 = 4 bonding electrons are needed. Each bond has two electrons, so the above diagram has all the necessary bonds. There are 2 bonds and hence 4 bonding electrons in the diagram. Lastly, fill in the remaining unbonded electrons on each atom. In total, there remain 8 - 4 = 4 electrons left to draw: Answer: | |
3D structure
![3D structure](../image_source/2ba77fc43d034d99a97c9098ddb13971.png)
3D structure
Basic properties
![molar mass | 20.027 g/mol phase | liquid (at STP) melting point | 3.8 °C boiling point | 101.4 °C density | 1.107 g/cm^3 solubility in water | soluble](../image_source/cd0094b876dfca30e6bc9edbd5608563.png)
molar mass | 20.027 g/mol phase | liquid (at STP) melting point | 3.8 °C boiling point | 101.4 °C density | 1.107 g/cm^3 solubility in water | soluble
Units
Liquid properties (at STP)
![density | 1.107 g/cm^3 vapor pressure | 16.4 mmHg dynamic viscosity | 0.001095 Pa s (at 25 °C) refractive index | 1.328](../image_source/9f6bca8680fd89972d5507f5b75bae38.png)
density | 1.107 g/cm^3 vapor pressure | 16.4 mmHg dynamic viscosity | 0.001095 Pa s (at 25 °C) refractive index | 1.328
Units
Thermodynamic properties
![molar heat of fusion | 6.2 kJ/mol specific heat of fusion | 0.3096 kJ/g (at STP)](../image_source/6f5902946e7eb559a3a552850f41bcf9.png)
molar heat of fusion | 6.2 kJ/mol specific heat of fusion | 0.3096 kJ/g (at STP)
Non-standard atom properties
![H-2 | 2](../image_source/9744186407aed6c13856a7cdac3b0423.png)
H-2 | 2
Chemical identifiers
![CAS number | 7789-20-0 PubChem CID number | 24602 PubChem SID number | 24849176 SMILES identifier | O InChI identifier | InChI=1/H2O/h1H2/i/hD2/f/i1D2 RTECS number | ZC0230000 MDL number | MFCD00044636](../image_source/f4510351a930a61885d799c5695c131d.png)
CAS number | 7789-20-0 PubChem CID number | 24602 PubChem SID number | 24849176 SMILES identifier | O InChI identifier | InChI=1/H2O/h1H2/i/hD2/f/i1D2 RTECS number | ZC0230000 MDL number | MFCD00044636
NFPA label
![NFPA label](../image_source/b3c56d35e26a415cbd26fcfdcf2ab68a.png)
NFPA label
![NFPA health rating | 0 NFPA fire rating | 0 NFPA reactivity rating | 0](../image_source/2eaccd7a3afd37a45e8afe72b65f8cbb.png)
NFPA health rating | 0 NFPA fire rating | 0 NFPA reactivity rating | 0
Toxicity properties
![odor | odorless](../image_source/11b911b22083f92364b2c97a7dd64caf.png)
odor | odorless
![RTECS classes | mutagen | reproductive effector](../image_source/08f4bbdf7a9d5214daad03382e0da9eb.png)
RTECS classes | mutagen | reproductive effector