Cation charge - PowerPoint PPT Presentation

Student exercise 1

Student exercise 1. 2011/10/04 20111067 Hakuba Kitagawa. 1.1 the exact mass. Formula: C 7 H 16 S. Formula: C 13 H 20 O. (j). (k). MW = 12.00000 x 7 + 1.00783 x 16 + 31.9721 x 1 = 132.097 38 = 132.097. MW = 12.00000 x 13 + 1.00783 x 20 + 15.9949 x 1

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Write the formula

Write the formula. Metal ( cation )first (roman) indicates metal charge Anion next, use first on PT for “ides” use half sheet for polyatomics Cation charge becomes anion subscript and vice versa(“ criss -cross” charges) Reduce as necessary by greatest common factor. Sodium Chloride.

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