Molecular Chemistry
Questions & Answers
2 - Formulas of lonic Compounds (5pts) Complete the table with the positive ion, negative ion, and the formula for the compounds. Use the subscript (X₂) and superscript (X²) buttons as needed.
\mathrm{K}_{3} \mathrm{PO}_{4}(\mathrm{aq})+\mathrm{Al}\left(\mathrm{NO}_{3}\right)_{3}(\mathrm{aq}) \rightarrow
Fill out the following table. (3 each) 1, 2 difluoro 2 methyl 4 pentanone 2 Chloro 2 propanol
1. Name this molecule. (4) Draw and name the hydration product of this molecule. (8)
Explain and/or describe any trends that you observed in bond lengths. Are these trends consistent with VSEPR theory (explain why or why not).
72. Calcium chloride and water react according to the following equation: \mathrm{CaCl}_{2}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CaO}+\mathrm{HCl} What mass of hydrogen chloride is produced from 84.7 g calcium chloride? Show all your work.
3 - Names of Molecular Compounds (5pts) Complete the table with the name for the compounds.
2) Advances in molecular machinery have afforded various approaches toward performing macroscopic like tasks at the molecular level. Fort o mimick the motion of vehicles at the molecular level nano vehicles have been designed and developed. Nano worms are a design of a nano vehicles that mmick caterpillar-like motion. a) Is this approach toward molecular machines a bottom-upor top-down approach? Why? b) Why dould these molecules exhibit caterpillar-like motion? c) Would there be a directional motion of these molecules on a surface? If yes indicate the-expected direction of motion via arrows. d) Why does the motion of these molecules need to be studied on a surface?
8. Suppose we used the particle in a three-dimensional cubic box as a crude model for the electron in a hydrogen atom. What value of 1 (the width of the box) would you have to use so that the energy of transition between the ground state (111) and the first excited energy level (112, 211 or 121) transition for this model would be the same as the exact value determined for the n = 1 → 2 from the Rydberg formula En = 2.1799 x 10-18/n²? Is this a reasonable value for the size of a hydrogen atom?
