Question

1. name the following compounds. each includes at least one polyatomic ion.

a) na₃po₄
b) (nh₄)₂so₄
c) mg(c₂h₃o₂)₂
d) (nh₄)₂s
e) caco₃
f) ba(no₃)₂

Explanation:

Step1: Identify Ions (a)

For $\ce{Na3PO4}$, cation is $\ce{Na+}$ (sodium), anion is $\ce{PO4^{3-}}$ (phosphate).

Step2: Name Compound (a)

Use cation name + anion name. Sodium phosphate.

Step1: Identify Ions (b)

For $\ce{(NH4)2SO4}$, cation is $\ce{NH4+}$ (ammonium), anion is $\ce{SO4^{2-}}$ (sulfate).

Step2: Name Compound (b)

Ammonium sulfate.

Step1: Identify Ions (c)

For $\ce{Mg(C2H3O2)2}$, cation is $\ce{Mg^{2+}}$ (magnesium), anion is $\ce{C2H3O2-}$ (acetate).

Step2: Name Compound (c)

Magnesium acetate.

Step1: Identify Ions (d)

For $\ce{(NH4)2S}$, cation is $\ce{NH4+}$ (ammonium), anion is $\ce{S^{2-}}$ (sulfide).

Step2: Name Compound (d)

Ammonium sulfide.

Step1: Identify Ions (e)

For $\ce{CaCO3}$, cation is $\ce{Ca^{2+}}$ (calcium), anion is $\ce{CO3^{2-}}$ (carbonate).

Step2: Name Compound (e)

Calcium carbonate.

Step1: Identify Ions (f)

For $\ce{Ba(NO3)2}$, cation is $\ce{Ba^{2+}}$ (barium), anion is $\ce{NO3-}$ (nitrate).

Step2: Name Compound (f)

Barium nitrate.

Answer:

a) Sodium phosphate
b) Ammonium sulfate
c) Magnesium acetate
d) Ammonium sulfide
e) Calcium carbonate
f) Barium nitrate