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7 August, 09:11

Sulphate is written as SO42-, what does the "4" represent and what does the "2-" represent?

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  1. 7 August, 13:05
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    (SO4) 2 The SO4 = 4 oxygen and having a 2 like that (SO4) 2 makes it have 2 S, and 8 O's
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