Question

nagment 10VESTUIT 377 Questions 1, 2, and 5: If there are 3 elements in the molecule, the first atom is the central atom and t others are bonded to it. 1. Draw the Lewis structures for each of the following ions or molecules. For each, give (i) the molecular shape, (ii) the electron pair geometry at the central atom, and (iii) the hybridization of the centra atom. Y (a) C02 (b) NO,CI (c) ICLA (d) ICI (e) CHI 2. Consider the following molecules or ions: CIOFs, NOBr, NH F, and XeO,F,. Answer the following questions based on the Lewis structures and VSEPR theory prediction of their molecular shapes. (a) Which one has only bond angles of 109.5°? (b) Which one has only bond angles of 120°? c) Which one has bond angles of 90 and 180°? (d) Which one has bond angles of 90, 120, and 180°? 3. Consider the four compounds GeH., AsHs, H Se, and HBr. Use periodic trends in bond lengths and the electronegativity table in Chang to answer the following questions: (a) Which molecule is expected to have the longest bonds? (b) Which molecule is expected to have the most polar bonds? (C) Which molecule is expected to have the least polar bonds? 4. Atom hybridization changes in many chemical reactions. In each of the following reactions, determine what change, 11 any, occurs to the hybridization of the underlined atom. (a) SO, + H2O + H2SO (b) CO + Cl2 → COCI, (C is the central atom) 5. Which one of the following molecules is nonpolar? POF, PH; NH F XeOF2 SiCL

Answer 1

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