Ba 2+

1. Ba2+ Step 2: The roman numeral 4 (IV) indicates that the ion has a +4 charge PROBLEM:Give the symbol, including the correct charge, for each of the following ions?(a) barium ion (b) titanium(IV) ions (c) phosphate ion (d) hydrogen carbonate ion(e) sulfide ion (f) perchlorate ion (g) colbalt(II) ion (h) sulfate ion Ti4+ Step 3: Phosphate ion – need to memorize polyatomic ions listed in your text on Table 2.4 PO43– Step 4: Hydrogen Carbonate ion - need to memorize polyatomic ions listed in your text on Table 2.4 HCO31– Step 5: S has an electron configuration of 1s2, 2s2, 2p6, 3s2, 3p4 – Therefore S needs to gain 2 electrons to complete its outer most shell Step 1: Ba has an electron configuration of 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 5s2, 4d10, 5p6, 6s2 S2– Step 6: Perchlorate ion - need to memorize polyatomic ions listed in your text on Table 2.4 Chlorate is ClO31– – per means one more oxygen with same charge – > ClO41– Step 7: The roman numeral 2 (II) indicates that the ion has a +2 charge Co2+ Step 8: Sulfate ion - need to memorize polyatomic ions listed in your text on Table 2.4 SO42–