CHMB31H3 Chapter Notes - Chapter 4: Vacuum Permittivity, Coordination Complex, Molybdenum Trioxide
Document Summary
Proton affinity is the negative of the gas phase proton-gain enthalpy: proton-gain enthalpy ( hpg ): the standard enthalpy of the reaction, proton affinity (ap): the negative of the proton-gain enthalpy. o. If the proton gain enthalpy is only slightly negative, then the proton affinity is low, indicating a weaker basic character. Substituted oxoacids have strengths that may be rationalized in terms of the electron-withdrawing power of the substituent; in a few cases, a nonacidic h atom is attached directly to the central atom of an oxoacid. The strengths of a series of oxoacids containing a specific central atom with a variable number of oxo and hydroxyl groups are summarized by pauling"s rules. An element that forms an acidic oxide is likely to form volatile, water. covalent halides. halides. Amphoteric oxide: an oxide that reacts with both acids and bases. It is observed for the lighter elements of group 2 and 13 (beo, al2o3 and ga2o3).
