What is the empirical formula for the tartrate ion?

Answer 1

^{Reduce: C2H2O3 this is the lowest ratio of the elements, but I don't think that is the correct anser. Here's why:}

^{From the Internet:} Since all ionic compounds are the simplest combination of atoms and since all empirical formulas are the simplest way to write chemical formulas, an ionic compound is always in its empirical state. All ionic compounds are empirical formulas, but NOT ALL EMPIRICAL FORMULAS ARE FORMULAS FOR IONIC COMPOUNDS.

So, I think the original formula above is also the empirical formula.

Answer 2

^{Reduce: C2H2O3 this is the lowest ratio of the elements, but I don't think that is the correct anser. Here's why:}

^{From the Internet:} Since all ionic compounds are the simplest combination of atoms and since all empirical formulas are the simplest way to write chemical formulas, an ionic compound is always in its empirical state. All ionic compounds are empirical formulas, but NOT ALL EMPIRICAL FORMULAS ARE FORMULAS FOR IONIC COMPOUNDS.

So, I think the original formula above is also the empirical formula.