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Ch 3 Chemical Compounds Part 2

Ch 3 Chemical Compounds Part 2 - CHE 1301 Ch 3 Chemical...

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CHE 1301 Ch 3 Chemical Compounds (2) – Nomenclature Naming Chemical Compounds ANSWERS (See also Examples 3-8 through 3-11, pg 86-90 Petrucci) The basic idea here is that we should be able to take the name of a compound and write it’s formula out, or vice versa. For ionic compounds we write formulae in which there is an overall neutral charge, meaning that we balance the charges of the cations(+) and anions(–) to give an overall charge of zero. Monoatomic cations take the name of the parent element. Polyatomics: In general, anything with –ate or –ite at the end has oxygen in it; the ‘ates’ have more oxygen atoms than the ‘ites’. Be aware of the ‘hypo-ite’, ‘ite’, ‘ate’ and ‘per-ate’ series for the oxyanions of chlorine – this can be applied to bromine and iodine also. Note Hydrogen carbonate vs Carbonate – the addition of a hydrogen atom is often seen and the nomenclature usually follows the simple rule of adding ‘hydrogen’ to the start of the name and reducing the negative charge on the anion by one. For oxyacids (compounds formed between hydrogen and an
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