CHE 2A Lecture Notes - Lecture 3: Tin(Iv) Chloride, Roman Numerals, Nitric Acid
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CHE 2A Full Course Notes
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Column 1 = alkali metals = +1. Column 2 = alkaline earth metals = +2. ---- skip over transition metals ---- (rarely any pattern in oxidation state) Column 17 = -1 (second column from the left) But in peroxide (o2 2-) , oxygen = -1. But in hydride (h 1-), hydrogen = -1. When hydrogen is in front of others in the formula (i. e. h2o), hydrogen is +1. When hydrogen is written last, (i. e. cah2), hydrogen is -1 each. Charge of molecule = sum(elemental charges/oxidation state) 2 = (1)*(oxidation state of sulfur) + (4) * (-2) Note: hydrogen is proton here, not hydride, since it"s not written last & therefore has +1 charge. Total charge = 0, so carbon = +4. Elements in elemental state have oxidation state 0. Any metal on its own = oxidation state of 0. List of diatomics x2 , oxidation = 0. Monoatomic = take stem name & add ide .
