CHM110H5 Lecture Notes - Lecture 7: Francium, Fluorine, Alkali Metal
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2: balance elements other than h and o (the components of the solvent, balance charges with h3o+ or oh , balance o with h2o, check that the half reactions are balanced (atoms and the charges, ensure that the # of e s resleaed in the oxidation half reaction = the # of e s gained in the reduction half reaction, add the two half reactions together, simplify where possible. Oxidation numbers: free elements: 0 (o3 or ar, monatomic ions: ionic charge (na+, complex ion: sum of oxidation numbers equals the ionic charge (clo4, alkali metals: 1, alkaline earths: +2, hydrogen: +1 (expecting peroxides, 1, oxygen: 2 (excepting peroxides, 1, halogens (other than f): 1 (excepting with o and halogens above it in the.