CHE 131 Chapter Notes - Chapter 4.5-4.6: Bromine, Fluorine, Hydrogen Peroxide
jeffrey.dunn and 30 others unlocked
55
CHE 131 Full Course Notes
Verified Note
55 documents
Document Summary
The key chemical event in an oxidation-reduction (redox) reaction is the net movement of electrons from one reactant to another. Covalent compounds- shift of electrons rather than a full transfer; ions do not form. > the oxidizing agent- the species doing the oxidizing (causing electron loss) > the reducing agent- the species doing the reducing (causing electron gain) Oxidation number (o. n), oxidation state, which is the charge the atom would have if its electrons were transferred completely, not shared. Rules: group 1a: o. n. = +1 in all compounds, group 2a: o. n. = +2 in all compounds, for hydrogen: o. n = +1 combination with nonmetals. O. n = -1 combination with metals and boron: fluorine: o. n = -1 in all compounds, for oxygen: o. n = -1 in peroxide (h2o2) O. n = -2 in all other compounds except with f: for group 7a : o. n. = -1 in combination with metals, nonmetals (except and other halogens lower in the group)