Question

Lab #22; Intermolecular Forces Pre-Laboratory Questions Name: 1. Read about intermolecular forces in your textbook, pages 467-472 Construct a table comparing the following intermolecular forces: dipole- dipole interactions, hydrogen bonds and London Forces. Force 5Do oe 6 nd then bout 2. Read example 11.10 on page 470 in your textbook. Then do problem 11.89 on page 484. But instead of just answering "yes" for the molecules 7 Ob that can hydrogen bond, draw each molecule twice and show the hydrogen bond that would exist. If a molecule cannot hydrogen bond, but it can form a dipole-dipole, draw the molecule twice and show the dipole- dipole force. If the molecule cannot form either of those forces, explain why. 106

Answer 1

torce Dipole - Dipole Type of cause of a Molecule Polar A polar molecules a dipole lecule cause of force Diagram opposite Example attract each other interactions molecule has F Ice Dipole of ene, molecule Dipete of another molecule negative end), on proper orientation, positive end of Greater the I dibole is attracted by dipole moment, negative end of another greater is the dipole guring rise to intermolecular Strong electrostatic forces attraction. of attraction. London Noble gases for Egi He, Ne, Az momentary assymetric election Lister to distribution which si lood produces of spherical Idistabution temporary dipole moments as ca) which in turn induces dipole moment in neighbouring Moving close to molecules. Thus, it results each other from instanteous diple- Linstanteous induced dipole origin forces interaction Instantane separation of charge due to monimo electron obkloud of London en bond NEN compounds. The election cloud is H-f...h-f... H-f... Home of Hydrogen largely displaced towards ... dotted line containing 1 Hydrogen bond the highly electronegative / adid line Istrongly atom. Because of this H I covalent bond Lefracto attracts and is attracted by Is Associated I molecules are live atom along the formed Inegative Kike fion