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Unformatted text preview: Chapter 4 Chem continued Solubility rules (will be given as of right now) Precipitation reactions o Write net ionic equations Must show you charges and must be balanced o Monoprotic acids one proton acids HCl H + + Cl- o Diprotic acids two proton o Triprotic acids three Oxidation- reduction reactions o Electron transfer reactions o 2 Mg 2 Mg +2 +4 e- o O 2 + 4e- 2O 2- o OIL RIG oxidation is losing , reduction is gaining Oxidation number o The charge the atom would have in a molecule (or ionic compound) if electrons were completely transferred o Free elements have oxidation number of 0 o In monatomic ions the oxidation number is equal to the charge on the ion o Oxidation number of hydrogen is +1 except when it is bonded to metals in binary compounds. In these cases its oxidation number is -1. o Oxidation number of oxygen is usually -2 o Group 1A metals are +1 , 2A are +2 and fluorine is always -1 o The sum of the oxidat ion numbers of all the atoms in a molecule or ion is...
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- Spring '08