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GenChemin210 - (b hydrogen(c hydrogen chloride(d nitrogen...

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Chemistry 210 Typical questions that can be answered based on learning in General Chemistry courses. I. Using precise language to represent atomic and molecular entities (also called atomic and molecular species). Using accurate representational forms to distinguish between the following: (a) bromide ion, molecular bromine, bromine atom (b) ammonia, ammonium ion (c) sodium ion, sodium (d) molecular oxygen, oxygen atom (e) hydrogen atom, molecular hydrogen, hydrogen cation (also called proton), hydrogen anion (also called hydride ion) II. Electron configurations and the relative stability of the closed shell electron configuration. Write electron configurations for the monoatomic species in Part I, and identify which have closed shell configurations. III. Lewis structures. Representing covalent bonds with lines, using "dots" (i.e., ":") for non- bonding electrons and charge-separated ions for ionic bonds, draw Lewis structures for the following: (a) ammonium bromide (b) hydrogen
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Unformatted text preview: (b) hydrogen (c) hydrogen chloride (d) nitrogen triiodide (e) ammonium tetrafluroborate (f) sodium fluoride (g) potassium hydroxide (h) lithium hydride (i) lithium tetrachloroaluminate IV. Phase changes and mixing. Represent the following processes using a series of 3 or 4 drawings that involve a collection of atomic or molecular species. (a) dissolving sodium chloride in water (b) evaporation of liquid water (c) melting sodium (d) mixing oxygen and nitrogen gases (e) evaporation of gold (f) the solubility of cesium fluoride in water is 100 times greater than sodium fluoride (why?) V. Inductive effects (electronegativity and electropositivity) (a) Identify all dipolar and non-polar covalent bonds in the molecules named in Parts I-IV. Indicate the direction of the polarization in dipolar bonds according to the partial charges anticipated at each atom. (b) Is iodide or fluoride a stronger reducing agent (why)? (c) Can sodium or potassium be oxidized more easily (why)?...
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