1. Lodine, l2, dissolves in an aqueous solution of iodide ion, I-, to give the triiodide ion, I3-. This triiodide ion, I3-, consists of one iodine atom bonded to two others.
Write the Lewis formula for the I3- ion.
Identify the bonding pairs and lone pairs in the Lewis electron-dot formula of I3- ion.
Predict the electron arrangement and the shape or geometry of the I3- ion using the VSEPR model. Draw the VSEPR sketch
What hybrid orbitals are expected for the central atom in the I3- ion
Describe the bonding in the I3- ion, using valence bond description and give the valence bond sketch of the I3- ion.
2. Distinguish between an acidic, basic and an amphoteric oxide. Is PbO2 an acidic, basic or amphoteric oxide?.
3. Use Lewis symbols to show the reaction of atoms to form a covalent molecule H2O. Write the Lewis formula for H2O assuming octet rule holds For atoms. Identify the bonding pairs and lone pairs in the Lewis electron-dot formula of H2O.
4. Predict the electron arrangement and the shape or geometry of the H2O molecule using the VSEPR model. Draw the VSEPR sketch. State the bond angle you would expect to see on the central atom based on the simple VSEPR sketch. Would you expect the bond angles to be greater or less than this? Would you expect a zero or a nonzero dipole moment for the H2O molecule. Explain your answer.
5. Use formal charges to choose the Lewis formula that gives the best description of the electron distribution for H2S03
b. Write resonance descriptions for the SO3 molecule.
6 a. Use molecular orbital theory to describe the bonding in Het. Find the bond order and decide whether it is stable. Is the substance diamagnetic or paramagnetic?
Write the orbital diagram for the ground state of the zinc atom. Is the atomic substance diamagnetic or paramagnetic?