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Title: How do you write the nomenclature for polyatomic ions? Post by: livoniabulldo on Sep 8, 2012 Example; say Aluminum Sulphate. How come the formula isn't Al2SO3 (if 2 and 3 are subscripts) Is there an easy method of remembering how to do this easily?
Title: How do you write the nomenclature for polyatomic ions? Post by: lexaebrown on Sep 8, 2012 sulfate is SO4^2-
aluminum is Al3+ You have to switch the charges and since that results in sulfate being multiplied by 3, you have to put the entire polyatomic ion in parenthesis. Al2(SO4)3 |