Question

determine the electron geometry (eg) and molecular geometry (mg) of ascl₃: eg - trigonal planar, mg - trigonal planar eg - tetrahedral, mg - trigonal pyramidal eg - trigonal bipyramidal, mg - trigonal bipyramidal eg - tetrahedral, mg - trigonal planar eg - trigonal planar, mg - bent question 25 1 pts determine the electron geometry (eg) and molecular geometry (mg) of scl₂: eg - tetrahedral, mg - trigonal planar eg - trigonal planar, mg - trigonal planar eg - trigonal planar, mg - bent eg - tetrahedral, mg - trigonal pyramidal eg - tetrahedral, mg - bent eg - trigonal bipyramidal, mg - trigonal bipyramidal

Explanation:

Step1: Determine central - atom valence electrons

For $AsCl_3$, As is the central atom. As has 5 valence electrons and each Cl contributes 1 electron for bonding. So the total number of valence - shell electron pairs around As is $\frac{5 + 3\times1}{2}=4$. For $SCl_2$, S is the central atom. S has 6 valence electrons and each Cl contributes 1 electron for bonding. So the total number of valence - shell electron pairs around S is $\frac{6+2\times1}{2}=4$.

Step2: Determine electron - geometry

The electron - geometry is determined by the total number of electron pairs (bonding and non - bonding) around the central atom. When the number of electron pairs is 4, the electron geometry (eg) is tetrahedral.

Step3: Determine molecular geometry

For $AsCl_3$, there are 3 bonding pairs and 1 non - bonding pair of electrons around As. The molecular geometry (mg) with 3 bonding pairs and 1 non - bonding pair is trigonal pyramidal. For $SCl_2$, there are 2 bonding pairs and 2 non - bonding pairs of electrons around S. The molecular geometry (mg) with 2 bonding pairs and 2 non - bonding pairs is bent.

Answer:

For $AsCl_3$: eg = tetrahedral, mg = trigonal pyramidal
For $SCl_2$: eg = tetrahedral, mg = bent