Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:Fe2+, Au3+, Br−, S2−
Question
Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:Fe2+, Au3+, Br−, S2−
Solution
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Fe2+ and Br−: The empirical formula would be FeBr2. This is because the Fe2+ ion has a charge of +2 and the Br− ion has a charge of -1. To balance the charges, we need two Br− ions for each Fe2+ ion.
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Fe2+ and S2−: The empirical formula would be FeS. This is because both the Fe2+ ion and the S2− ion have charges of 2 (but opposite signs), so we need one of each to balance the charges.
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Au3+ and Br−: The empirical formula would be AuBr3. This is because the Au3+ ion has a charge of +3 and the Br− ion has a charge of -1. To balance the charges, we need three Br− ions for each Au3+ ion.
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Au3+ and S2−: The empirical formula would be Au2S3. This is because the Au3+ ion has a charge of +3 and the S2− ion has a charge of -2. To balance the charges, we need two Au3+ ions for three S2− ions.
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Fill in the name and empirical formula of each ionic compound that could be formed from the ions in this table:Some ionic compoundscation anion empirical formula name of compoundMn3+ F− emp Mn2+ Br− Rb+ O2− Mg2+ S2−
To fill in the table, we need to balance the charges of the cations and anions to find the empirical formula for each ionic compound. Then we can name the compound accordingly. 1. For the cation Fe^3+ and the anion S^2-: - To balance the charges, we need two Fe^3+ ions for every three S^2- ions. - The empirical formula is Fe2S3. - The name of the compound is iron(III) sulfide. 2. For the cation Pb^4+ and the anion O^2-: - To balance the charges, we need two Pb^4+ ions for every four O^2- ions (which simplifies to one Pb^4+ for every two O^2-). - The empirical formula is PbO2. - The name of the compound is lead(IV) oxide. 3. For the cation Mn^2+ and the anion N^3-: - To balance the charges, we need three Mn^2+ ions for every two N^3- ions. - The empirical formula is Mn3N2. - The name of the compound is manganese(II) nitride. 4. For the cation Fe^2+ and the anion P^3-: - To balance the charges, we need three Fe^2+ ions for every two P^3- ions. - The empirical formula is Fe3P2. - The name of the compound is iron(II) phosphide. So the completed table should list the empirical formulas and names of the compounds as follows: - Fe2S3, iron(III) sulfide- PbO2, lead(IV) oxide- Mn3N2, manganese(II) nitride- Fe3P2, iron(II) phosphide
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