metasilicic acid

metasilicic acid

formula | H_2O_3Si name | metasilicic acid IUPAC name | dihydroxy-oxo-silane alternate names | acid um silicicum | cubosic | silicic acid mass fractions | H (hydrogen) 2.58% | O (oxygen) 61.5% | Si (silicon) 36%

Draw the Lewis structure of metasilicic acid. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the hydrogen (n_H, val = 1), oxygen (n_O, val = 6), and silicon (n_Si, val = 4) atoms: 2 n_H, val + 3 n_O, val + n_Si, val = 24 Calculate the number of electrons needed to completely fill the valence shells for hydrogen (n_H, full = 2), oxygen (n_O, full = 8), and silicon (n_Si, full = 8): 2 n_H, full + 3 n_O, full + n_Si, full = 36 Subtracting these two numbers shows that 36 - 24 = 12 bonding electrons are needed. Each bond has two electrons, so in addition to the 5 bonds already present in the diagram add 1 bond. To minimize formal charge silicon wants 4 bonds and oxygen wants 2 bonds. Identify the atoms that want additional bonds and the number of electrons remaining on each atom: Fill in the 1 bond by pairing electrons between adjacent highlighted atoms: Answer: | |

3D structure

molar mass | 78.098 g/mol phase | solid (at STP) melting point | 1704 °C density | 1 g/cm^3

density | 1 g/cm^3

specific free energy of formation Δ_fG° | solid | -13.99 kJ/g molar free energy of formation Δ_fG° | solid | -1092 kJ/mol specific heat of formation Δ_fH° | solid | -15.22 kJ/g molar heat of formation Δ_fH° | solid | -1189 kJ/mol (at STP)

CAS number | 7699-41-4 PubChem CID number | 14768 SMILES identifier | O[Si](=O)O InChI identifier | InChI=1/H2O3Si/c1-4(2)3/h1-2H EU number | 231-716-3 Gmelin number | 42989 RTECS number | VV8850000

RTECS classes | tumorigen | mutagen | primary irritant