Math

QuestionPredicting the formula of binary ionic
Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Fe2+,V5+,F,S2\mathrm{Fe}^{2+}, \mathrm{V}^{5+}, \mathrm{F}^{-}, \mathrm{S}^{2-} \square

Studdy Solution
Form a compound using V5+\mathrm{V}^{5+} and S2\mathrm{S}^{2-}.
The charges are V5+\mathrm{V}^{5+} (5+) and S2\mathrm{S}^{2-} (2-). To balance the charges, we need two vanadium ions and five sulfide ions, but the simplest ratio is achieved with two vanadium ions and three sulfide ions.
Empirical formula: V2S5\mathrm{V}_2\mathrm{S}_5
These are the empirical formulas for four binary ionic compounds that can be formed from the given ions:
1. FeF2\mathrm{FeF}_2
2. FeS\mathrm{FeS}
3. VF5\mathrm{VF}_5
4. V2S5\mathrm{V}_2\mathrm{S}_5

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