name of arsenic(III) sulfide

arsenic(III) sulfide

formula | As_2S_3 name | arsenic(III) sulfide mass fractions | As (arsenic) 60.9% | S (sulfur) 39.1%

Draw the Lewis structure of arsenic(III) sulfide. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the arsenic (n_As, val = 5) and sulfur (n_S, val = 6) atoms: 2 n_As, val + 3 n_S, val = 28 Calculate the number of electrons needed to completely fill the valence shells for arsenic (n_As, full = 8) and sulfur (n_S, full = 8): 2 n_As, full + 3 n_S, full = 40 Subtracting these two numbers shows that 40 - 28 = 12 bonding electrons are needed. Each bond has two electrons, so in addition to the 4 bonds already present in the diagram add 2 bonds. To minimize formal charge arsenic wants 3 bonds and sulfur wants 2 bonds. Identify the atoms that want additional bonds and the number of electrons remaining on each atom: Fill in the 2 bonds by pairing electrons between adjacent highlighted atoms: Answer: | |

molar mass | 246 g/mol phase | solid (at STP) melting point | 300 °C density | 3.43 g/cm^3

density | 3.43 g/cm^3

molar heat of fusion | 28.7 kJ/mol specific heat of fusion | 0.117 kJ/g (at STP)

CAS number | 1303-33-9 PubChem CID number | 4093503 PubChem SID number | 24852111 SMILES identifier | S=[As]S[As]=S InChI identifier | InChI=1/As2S3/c3-1-5-2-4 RTECS number | CG2638000 MDL number | MFCD00003435