Hydrogen bonds In ice Hydrogen bond between water molecules Ice Melting→ Water Ice 26
26
Water molecules Chloride ion(Ch-) Sodium ion(Na+) ④ Undissolved sodium chloride Dissolution of an ionically bonded compound, sodium chloride, by water molecules
27 Dissolution of an ionically bonded compound, sodium chloride, by water molecules
Cl ④(Na CI ④( CI XNa*y Cl C CI CI IN a白
28
Water, a polar molecule Ethane, a nonpolar molecule The difference between a polar(water)and nonpolar(ethane) molecule is due to the unequal sharing of electrons within the polar molecule Nonpolar molecules have electrons equally shared within their covalent bonds
29 The difference between a polar (water) and nonpolar (ethane) molecule is due to the unequal sharing of electrons within the polar molecule. Nonpolar molecules have electrons equally shared within their covalent bonds
Dipole moment Covalent bond length =0.095 nm 104.3° Van der waals radius of oxygen=0. 14 nm Van der waals radius of hydrogen =0.12 nm H O H-O +⑩ H
30