Question

determine the name of the ionic compounds listed below with both a transition metal and a polyatomic ion: 1. pbso₃ 2. fepo₄ 3. ni(no₃)₂ 4. cu(oh)₂ 5. auno₃

Explanation:

Step1: Identify polyatomic ions

For 1. $PbSO_3$, the polyatomic ion is $SO_3^{2 -}$ (sulfite). Lead can have multiple oxidation - states, here it is $Pb^{2+}$, so the name is lead(II) sulfite.

Step2: Identify polyatomic ions

For 2. $FePO_4$, the polyatomic ion is $PO_4^{3 -}$ (phosphate). Iron can have oxidation - states of +2 or +3. Since phosphate has a 3 - charge, iron here is $Fe^{3+}$, so the name is iron(III) phosphate.

Step3: Identify polyatomic ions

For 3. $Ni(NO_3)_2$, the polyatomic ion is $NO_3^{-}$ (nitrate). Nickel has a 2+ charge here, so the name is nickel(II) nitrate.

Step4: Identify polyatomic ions

For 4. $Cu(OH)_2$, the polyatomic ion is $OH^{-}$ (hydroxide). Copper has a 2+ charge here, so the name is copper(II) hydroxide.

Step5: Identify polyatomic ions

For 5. $AuNO_3$, the polyatomic ion is $NO_3^{-}$ (nitrate). Gold can have oxidation - states of +1 or +3. Since nitrate has a 1 - charge, gold here is $Au^{+}$, so the name is gold(I) nitrate.

Answer:

1. lead(II) sulfite
2. iron(III) phosphate
3. nickel(II) nitrate
4. copper(II) hydroxide
5. gold(I) nitrate